CS50x 2024 - Lecture 0 - Scratch

[@yothisiselmo]

this dude is max level in presentation and public speaking

[@itzabot]

he maxed out his social stats

[@juntus89]

Not really. He talks to the audience as if they were a group of children. Trying to get them excited etc and making them giggle. But we are adults - not kids. It's actually very patronising his way of talking. Cringe

[@vaibhavnarayan7079]

@@juntus89 I like him for it because not all of us are pretentious serious adults we still are late teens curious to know and yes better stop calling everything cringe rather than yourself mate

[@juntus89]

@@vaibhavnarayan7079 Your grammar is terrible. I think you need to go back to school and re-learn English, lol. I get it bro, you like men... but don't take life too seriously ok? XD

[@_kenzei._]

@@juntus89 okay Elon Musk you can go and watch from other "serious" adults

[@vaibhavnarayan7079]

I am from india and here we have a rigorous entrance exam which consists of physics chemistry and maths and it made me lose my interest in the things I loved about computers and programming now when I couldn't clear the entrance exam twice I am here to revive the interest and get hold of my passion thanks sir David for again making me believe myself will definitely complete this course

[@Ayo-mw2wf]

JEE?

[@Shaktisingh41403]

That's the harsh reality

[@kaustubhkadam1083]

JEE sometimes fucks up a person

[@ziyadhyder]

tbh JEE is a good exam ( I couldn't even qualify mains) but the competition is too high ...seats are very few like 16k seats for which 16 lac students fight ..the level of exam is high and enough to make dahi of someone's brain ...when a person clears Adv and goes to IIT ..he's already immune to exam like adv so the engineering syllabus would be challenging enough yet the person will be able to challenge it ...that's the reason IIT's and NIT's produce some of the best engineers who are industry ready unlike other tier 3 colleges who teach ntg just some theory which is not even used in job industry .. we need more and more IIT/NIT seats

[@mihirvartekar3720]

If you couldn't crack them just give up already

[@catriecegilbert7271]

I am so glad to have started this course! And am even more jealous of the students who get to take it live! Thank you Harvard for making this accessible to us :')

[@katjamadsen1703]

Right? I'm so jealous as well. It would have been SO awesome to get to take this class live. Good luck!

[@chaskatv3496]

i heard about devin -software ai, is it worth to start learning cs 50 -coding

[@HasinaChowdhury-lr7pw]

Is this course and CS50 introduction to computer science same mentioned in the web

[@zuzudev]

@@chaskatv3496 It was a hoax. Devin failed in most tests and the videos they showcased were fake. People believe the company just wanted to make some money off the idea. But starting the course is always a good idea! I'm just starting as well, so hopefully I'll see you through these comments, good luck!

[@Dawood_MDBR]

Hello Wolrd! I'm starting this course today, if you're seeing this comment, please like it. So if i forgot about the course after, i will return and complete the course,Thank you!!

[@aragsanahmed-gt7dn]

let's finish it

[@kushwahabhisheksingh1923]

How far you go bro

[@belotarecords4113]

hows u goin

[@malak-bx1up]

how many lectures did u finish

[@andaliamaureen]

Same here. We can do this.

[@yuhengleong.contact]

Hello, world! I'm starting CS50X today, looking forward to learning with everyone. All the best, hopefully I will see you all at the finish line.

[@homeylau]

I'm starting CS50X today, let's fight together!

[@user-Anon-5189]

I just started too :) All the best to you also and I will see you at the finish line. We've got this:)

[@MBXD001]

me too

[@harshkataria3988]

@@homeylau hey I am also starting today, ping your social media ID to keep discussing stuff of cs50

[@BigZac904]

Let’s do this!

[@kamfuku]

Dr. Malan is hands down one of the greatest teachers ever it's not just his knowledge of the field and technical acumen but his ability to convey such knowledge in a way that inspires you while at the same time making it fun and accessible to anyone. Thank you so much for your incredible work Dr.Malan and thank you Harvard for making this gem available to us all.

[@katjamadsen1703]

Agree! I love how respectful Dr. Malan is, when student's ask questions.

[@3xAudio]

i was about to watch at 1.25 speed to save some time but this guy is already speaking at 2x haha

[@xyzshyam]

same 😅

[@Ahmad-yi6d]

It's 4x 🤪

[@cintheciege]

He’s awesome tho. Like a walking breathing computer lol

[@colbiepham1329]

Haha😂

[@anisurrahmanatik9706]

i'm from bangladesh .. i was about to watch at .75 sopeed. however i don't understood the speach

[@SurajCdry]

Just completed CS50. It is absolutely worth it. David carries forward the same energy in all the lectures. The course might eventually feel more difficult, but it will be absolutely worth it. Good luck everyone!

[@JA809_]

How long will it take you to finish?

[@SurajCdry]

@@JA809_ It took me around 2 weeks. I was studying and trying to solve the problem sets most of the time during those two weeks.

[@abdurrafay1747]

@@JA809_ hey i want to get into robotics is this course good to start programming for that purpose ?

[@JA809_]

@@abdurrafay1747 is to develop apps or programming, i think they are courses for robotic etc in the same edx from verizon..

[@J35Y1]

​@abdurrafay1747 yes, python and Javascript specifically best used for robotics

[@anhhct]

Watching the beginning of this video makes me wanna cry. It moved me because of the quality of education in this world, one that I missed during my younger time. Now that I am a father of a little boy, it also encourages me to become a better dad, and to try to raise my boy so that he's eager about education out there, so that he can fulfill the dream that his dad missed. Thanks Harvard for making this available.

[@charlesuwah3404]

You haven't missed it. You can still have it all. Just start now.

[@anhhct]

@@charlesuwah3404 yeah. I'm a software engineer now so I know these stuff. It just wasn't available to me when I was younger, or should I say I wasn't grabbing my opportunity back then, which takes me longer to learn and never really getting all the potentials. I still watch these things because they still give me new things to learn, also to remind me of how great education is available out there for you to grab, which I'll try to tell my son the same.

[@SAMSHUKLA359]

Beta hillaara rha hoga aaapka!!!!!!!

[@brandenalexander6245]

I get chills reading this comment because that is how I felt. I realized the quality of he teaches made me focused so much more and tuned in so much more. We got this!

[@jamespina6416]

This is why an education at Harvard must be so sought after. Their teachers have a way of making incredibly complex instructions accessible to everyone! I never graduated from highschool but even with just a GED this man is breaking these things down to a level where I am able to kinda get it.

[@RogerClubv]

It has been 22 years since I earned my master's degree. I wish I had a professor like this at UCSD & USD. His passion and explanation of the subject matter make CS more interesting and captivating. I'm so jealous! I love watching all these videos for my self-gratification. Thanks for making it accessible to the public!!!

[@ChaudryAsif]

28 years to be precise. I am taking it along with my daughter. I want her to get basic knowledge of CS and all these languages are new to me. I work in IBM's iSeries. 😊

[@JethroDawnfine]

Congratulations to the team behind these "Lectures" videos. I think it's the best way of teaching on KZbin since it grabs our attention, it's not boring as slides and monotonal narratives. It just keeps us interested and a 2 hours video seems to be so fast. You guys are the best!

[@harshitchouhan]

It's my first day at CS50 and I am too excited as I have watched this First video and I have to say that David is best Teacher in His Field. He knows how to teach . He is such an amazing Teacher. I am feeling jealous from the students who have attended it Live but not an issue I can watch it online. Thanks to David and Harvard for making this course free.

[@user-Anon-5189]

I agree, I've tried this course with other teachers and I was absolutely lost. He is AMAZING!!

[@allaboymm]

how is it going?

[@nttrn]

I’ve begun watching 2023 edition, it’s not just a lecture course it’s like mini series with good and effective video. So jealous all of Harvard student who had learned this course live! even I’m middle age still wanting to learn! Omg Happy new year! ❤

[@muhammadfurqan4616]

Which year's should i watch?

[@TheBlackmanShow]

Just getting back into this and I WILL complete this class and ALL of my other BA coursework!!! Let's GROW!!! 💪🏾 No excuses! Who's with me!?

[@sandhyac2384]

the comments made me realize, I'm not alone taking the course in the middle-age after several regrets about my education :). Glad to have started this and hoping to get through the finish.

[@nwenensirimjr661]

Started today mate!

[@s.c.murdah2174]

Me too! That English Lit Major/Art History Minor, though enriching wasn't vocationally prosperous

[@a.198]

It's 8th of June (2024) and I am starting this course today. I'll complete the whole course and tell about my experience here. Best of luck to me !

[@joaonogueira3401]

i'm starting today 13 of June

[@waghmareSangita-le7jr]

​@@joaonogueira3401 Me too 😅

[@myinfoghana]

Best of luck to us

[@arnav3133]

Starting today - June 15th. Hopefully I actually finish something for once in my life.

[@joaonogueira3401]

@@arnav3133 you will bro, you will

[@이이이-g4f2y]

CS50 is a truly exceptional course that stands out from the typical university experience. Most college classes don't differ much from a professor lecturing on their own, but CS50 is the complete opposite. We should focus on what makes this kind of transformative learning possible. The course brings together all the elements of outstanding education: a brilliant professor, comprehensive lecture notes and self-study materials, challenging problem sets with automated grading, additional practice exercises, short video explanations, and small group sections. They even provide guidelines on how to effectively use AI in your studies, rather than banning it outright like many universities. David Malan and the entire CS50 team have created an impressive educational system and end-to-end process. It's a model that deserves attention and emulation not just in computer science, but across all subjects and areas of education. This is what world-class teaching looks like in action. This quality of education system should be new standard of lecture.

[@Trueguide6162]

I am speechless. The lectures are so interactive and well designed unlike the boring lectures we see in our college

[@muslimah78999]

@@Trueguide6162 hey did you understand the unary part where he says that we can count upto 32 please can you please it to me how???? How we represent numbers in this way.

[@purangki]

@@muslimah78999 Watch it again

[@conenone]

@@muslimah78999 he meant that you can count up to 32 by comparing fingers to bits, a raised finger is a 1 and a lowered finger is a 0, that way you have 32 possible combinations, its 2^5 or 2x2x2x2x2 which is 32

[@muslimah78999]

@@conenone thankyou so much!

[@opeyemi_salesforce_journey]

I love this course. It re-ignited my passion for programming once again. The concept are much more understandable and I'm literally joyous within me for the 0's and 1's that does the magic. Hope I could represent them here. Thank once again

[@waynexiong6828]

Don't know why someone said this lecture is ugly. It's the true programming 101 for those students with no base. Unlike Harvard, UCL, just tell you what does each term do, and let you start programming, assuming everyone is genius who can programme without understanding the logic behind that.

[@KushalAshok]

It was fun testing this on my hand 😂 15:00 You can count up to 31 using your fingers on one hand by employing a binary counting method. Here’s how it works: 1. **Assign Values**: Each finger represents a binary digit (bit). From thumb to pinky, the values are \(1, 2, 4, 8, 16\). 2. **Count in Binary**: Each finger can be either up (1) or down (0). By raising different combinations of fingers, you can represent numbers from 0 to 31. - Thumb up = 1 - Index finger up = 2 - Middle finger up = 4 - Ring finger up = 8 - Pinky finger up = 16 3. **Example**: - Thumb and index finger up: \(1 + 2 = 3\) - Thumb, index finger, and middle finger up: \(1 + 2 + 4 = 7\) - All fingers up: \(1 + 2 + 4 + 8 + 16 = 31\) Using this method, you can represent any number from 0 to 31 with just one hand.

[@kushwahabhisheksingh1923]

Thanx brother you shared knowledge in comment section 😊 love from india ❤

[@abitolearns]

yooo 🎉 🤯

[@GrimGrinner]

@@kushwahabhisheksingh1923 *Thanks ChatGPT

[@aif4046]

Thankyou, I was confused 😕

[@forhamsters]

Hello world!!!!! i started learning this course today and it is super fun!!!! This teacher is so fun and enterteining. Im from Lithunia. If youre a teenager or an adult dont hesitate. start now. im a 6th grader and he explains everything so easily!!!! 110% recomend. Big thanks to harvard so this sc50 course is for free!

[@xxshrixx0]

I'm also ❤

[@md_nawshin_zaman]

Finally! Starting again. This time I am finishing the CS50X ingshaAllah

[@Sayied-s7d]

Inshaallah

[@khaleelhendricks4211]

May it be easy for you in shaa Allah

[@olalekanaleem456]

would you like to study together ? I have not done really passed through week 4

[@olalekanaleem456]

@@Mvamjb Got whatsapp?

[@olalekanaleem456]

Or Discord?@@Mvamjb

[@NathanielArcher-s9u]

Your teaching style send chills down my spine, super engaging. God Bless You.

[@sangjunlee8200]

The passion this professor has somehow makes me feel life is beautiful. Keep it up.

[@user_563_]

Hello world ! I am a college student from india,currently studying bachelors.....I feel blessed that i found this cs50 and literally it feels like first time i m geeting my real world doubts clear,the things i always wonder how they actually works and how they r done....A great thanks to everyone who proposed this idea making these lectures free and of course a big thanks to Mr.David❤ He's a legend explaining the topics as he's also learning them from our perspective.....Lastly a very good luck to u all and i hope we all will learn so much from this😊😊

[@alittleantidote5852]

This is an extremely smart set-up. You get 3 different forms of income coming from the same lectures. You get the tuition of the students attending in person, the payment of those who want to get the certificate in the online course, and the youtube payment for all these videos watched by those who are doing the free course (or those who are just curious) and those who are paying for the certificate... it's quite brilliant

[@purangki]

It's brilliant in a way that no one even feels like they've been robbed or ripped off no matter what means or channel you accessed this course 🙌 All worth it

[@kilwa567]

So? What matters is that it's helpful..

[@alittleantidote5852]

@@kilwa567 your comment gives me the impression you think my original comment is attacking the video/setup when it isn't

[@kilwa567]

@@alittleantidote5852 nah bro, i didn't mean to attack you or smth, i just wanted to say that... A good thing is a good thing, it doesn't matter if you get money or not.

[@unbeknownstx12]

I took this course in 2023 and quickly fell out around lecture 3. But this time in 2024, I'm gonna finish it. I now understand binary and the concepts of functions, Booleans, etc. My original major was Computer Engineering 10 years ago before dropping out. I've learned a bit of Python along the way and now want to take it to the full extent. I've studied a bit of A+, Sec+, and Net+. This was so well developed that I'm just grateful I get to take another stab at it. Thank you so much for being an inspiration in changing lives, CS50. Anyone with enough determination can grasp the concepts, and maybe somewhere along the way, I can find where Computer Science fits into my life. I urge anyone scared of taking this course to reevaluate it in the sense that it may be daunting, but anything is possible with enough passion for learning something new. I can't wait to update once I get the certification.

[@ansae5582]

That's awesome, power to you friend! I wonder how much you're into the course as of now?

[@NabayegoRebecca]

Can you please try to explain for me the unary, binary concepts and booleans

[@The_Silly_Person]

Have a great year!🎉

[@kittyCchan]

A start of 2024 with CS50 is the best start! Greetings from Italy.

[@army4ev77]

Agree, Greetings from Morocco.

[@AbdiasEliu]

Agree, Greetings from Argentina.

[@Alessioleva]

Ho preso coraggio e l'ho iniziato anche io, non vedo l'ora di arrivare ai miei risultati, buona fortuna!

[@chaskatv3496]

i heard about devin -software ai, is it worth to start learning cs 50 -coding

[@bilalsaglam3674]

Here's to another fantastic year with CS50 in 2024! The passion and dedication Professor David Malan brings to teaching create an enjoyable and memorable learning experience. CS50 is more than a course; it's an inspiring journey led by an exceptional educator. Thank you, Professor Malan, for your steadfast commitment to fostering a deep understanding of computer science and making it accessible to learners of all backgrounds. Warm greetings from Turkey, where your impact is felt across borders!

[@ThatLionessGirl]

This is so so well made and not at all boring. This is the most interactive and well presented lecture I've ever witnessed. Hats off! Thank you for this amazing resource Havard :)

[@frankciscophil7721]

Starting my journey into programming at June 21, 2024. Hoping to learn C, web dev, get a job to support myself and eventually the dream goal; game development. I'm hoping to study and work hard as I can, and I'm hoping that this course will get me on the right track. Please do your best, me.

[@nathanaeladityanugraha5833]

MAN!! GOOD LUCK

[@hariyaligamerz5957]

Brother which College ?

[@DylNewman]

This was such a good lesson. I have 0 experience with CS but am an avid gamer and the part with scratch and breaking down the functions and conditionals really made me look at games in a new light. The theatrics were really solid too. Makes me wish I had taken school seriously.

[@Raud2023]

I feel really thankful for having this course for free. Thanks a lot. I like your enthousiasm throughout the class.

[@vaibhavnakrani2983]

I’ll be finishing the course this time. Although I have lot of programming knowledge by now. This is a classic 🎉

[@Danmaster01]

i've quit twice haha

[@stefanilic8445]

​@@Danmaster01 same but this time I will finish it

[@carlosbarross]

@@Danmaster01 Me too :(

[@_notsaf]

haha same i will!

[@Danuxsy]

no u wont, u will give up again.@@stefanilic8445

[@AdityaKumar-bk7eu]

So a class at Harvard is no less than a theatrical performance! Makes me want to attend it live!!

[@AdityaKumar-bk7eu]

​@cobra-jf3kq Nahi he koi bhi kar sakta hai jisse interest hai

[@littleturtle3289]

It's insane how David is so excited with teaching that he, multiple times, becomes breathless and exhausted for speaking a lot or running between laptop and screen. Gives me great motivation to study!

[@Be-vh6zz]

Yes same

[@sm3llyfritz58]

It is my second day on this video, and I am carefully jotting down, as well as doing my very best to understand this, and I am loving it!!! Thank you CS50!

[@Respect-fx3gu]

Starting at July 3rd, 2024. Passionate to complete it👍 Edit: Like my comment so that I can get reminded

[@sardorbekyorqulov]

One of the best lectures I've ever seen in my life. Greetings from Uzbekistan! Thank you for your time, Prof. David J. Malan. I hope to join your team, Insha'Allah.

[@LifeHacksMP]

Just finished this lesson to find out they made an updated version! Decided to give it a second watch and was glad to see the additional resources provided. Thanks everyone for all that you do!

[@adsvfs2121]

is it worth me starting from here without watching previous cs50?

[@LifeHacksMP]

Certainly, it's the same information just presented in an updated manner.@@adsvfs2121

[@JonhHSmith]

@@adsvfs2121 yes

[@eduardaschucko]

what do u mean? is this the complete update?

[@irvinalexisvalenciayanes7373]

It took me 10 seconds to make up my mind and decide that I will go to Harvard. Putting so much care into making an intro for a class is incredibly motivating. 1- Apply to Harvard. 2. If accepted 3. Else if not accepted Go back to step 1

[@gauravrawat.7]

Here are the Key points of this course: 00:03 CS50x - Introduction to computer science and programming 04:56 Computer science offers general problem-solving skills applicable to various fields. 08:54 CS50x 2024 is a supportive and inclusive learning community. 10:49 CS50x offers problem-solving experience with puzzles, teamwork, and a final project. 14:40 Unary and binary number representation 16:39 Binary representation as a concept of on/off in computers 19:59 Understanding the base-10 system is key to coding and programming. 21:46 Binary number system basics 25:06 Computers operate on the same pieces of information and instructions. 26:54 Representation of numbers and letters with binary 30:41 ASCII codes map English letters to numbers. 32:22 ASCII is a mapping used to store information in devices. 35:23 Spelling out words using numbers 37:01 Week one assignment involves someone from the Nintendo World 40:35 Emojis represent characters drawn and painted in different ways 42:22 Skin tone can be represented using the same pattern of bits. 46:00 Colors on computer screens are represented using RGB values. 47:48 0's and 1's can represent different things based on context 51:21 Algorithms are step-by-step instructions for solving problems. 53:12 Writing code to solve problems correctly is a key goal 56:34 Comparison of Algorithms based on Problem Size and Time Complexity. 58:15 Efficiency and design are key in implementing well-designed and correct algorithms. 1:01:56 Pseudocode and handling different outcomes in programming 1:03:42 Introduction to fundamental programming concepts. 1:07:28 Implementing algorithms for chatbot and AI. 1:09:33 Software can probabilistically infer responses based on patterns online. 1:13:05 Learning will be more enabling in the coming years. 1:14:46 C is the language that will be covered next week. 1:18:23 Scratch lives in a Cartesian plane with x-y coordinates. 1:20:09 Creating and editing code blocks in Scratch 1:23:53 Programming a basic prompt and response system 1:25:38 Understanding and implementing join blocks in Scratch. 1:29:20 Using Scratch to make a cat meow 1:30:54 Using loops to reduce code redundancy 1:34:17 Abstracting away the meowing concept makes the code simpler. 1:36:11 Creating modularity and abstraction through functions. 1:39:24 Using various extensions to create logical bugs and resolve them. 1:41:04 Creating games using Scratch's building blocks. 1:44:39 Introduction to sprites and randomness in game development. 1:46:06 Implemented the stage and created sprites in Scratch. 1:49:48 Break down coding tasks into baby steps to achieve the grand vision 1:51:32 Implementing custom puzzle pieces and abstractions for keyboard and wall interactions. 1:54:53 Exploring MIT's involvement in the game 1:56:40 Introduction to the Scratch project 1:59:34 Introduction to CS50 and university culture 2:02:18 CS50x lecture series encourages participation and involvement in various activities.

[@highgrace4life]

can i get a job with this certificate i am currently studying it

[@Goodlifemongo]

I started this course today and will take my time to learn everything. Like to remind me of my goal 🙏

[@paddfg]

Happy New Year 2024! Start the year by studying CS50. Thank you our great lecturer!

[@ElliePorter-p8x]

I'm so glad this course is available to the general public. I've spent the majority of my career in business and am looking for a change. Another KZbinr (who I can't remember) recommended this course and I'm so glad to have found it. I wish I had taken something like this in college.

[@raskillyo6675]

Thx so much for making this free! The instructor gives an absolutely great performance, entertaining and highly informative! Also I'd never thought to get rickrolled by Harvard :D

[@GrimGrinner]

Ikr why did no one else notice XD

[@blackgirlzcode]

Hey everyone! Completed a 6 month software engineering bootcamp feeling very insecure about my knowledge and ability to apply things on my own. Hoping to fill in any gaps and gain more confidence through this course and extra practice. So grateful to be here!❤️🙏🏾

[@talentedjohnson2240]

My year to Get my dream straight. Thank you Mr malan and Cs50 Harvard

[@fin1224]

Starting on 13th March 2024! Hope we can go through this and complete the course!

[@burgerCheese2020]

Nice Nice. I'm starting today. Hope you are continuing your journey with CS 50

[@Swegrid]

How is this going guys ? I just started today !

[@haneef150]

Just started! Y'all how's it goin'?

[@leandrofornaziero]

Olá pessoal! Hoje é dia 11/07/2024, e estou começando o curso e pegando algumas video aulas de varios locais para aprender mais sobre programação e Ciência da Computação. Sou brasileiro, e se você que está lendo também for, mantenha o foco e continue estudando e adquirindo cada vez mais conhecimento aos poucos. Lembre-se, cada um está correndo a própria maratona, então vá no seu tempo e tudo dará certo. Bons estudos a todos! 🤜🏻🤛🏻

[@diegop401]

Starting CS50 today, July 26, 2024, after a lot of ups and downs in my programming journey. I hope this can be the final push I need to start taking it seriously. Good luck to everyone doing the course!

[@tshepisosoetsane4857]

😀🤣😂Amazing I went to Harvard while I am in South Africa relaxed in my couch learning Computer Science good times of our lives hope Africans are taking this opportunity for real

[@nirmalya_nanda]

I started this course today and it's absolutely brilliant. It has just invoked me to learn everything that's out there. Thank you Prof. Malan!

[@Jelte_Dijkmans]

I officially completed this yesteryear on the 30th. Now that the new year has begun I want to thank Everyone that made this possible! - Jelte

[@dreamelbon3789]

How easy was it to do the project and fulfill the requirements

[@arnold7stacevich]

@@dreamelbon3789 I finished mine yesterday. Final project took me about 2 weeks. I made a small chrome extension. It''s not hard to fulfill requirements. But few of the problem sets can be more challenging than you may expect. Full course took me 4 months. Of course it can be done faster, but i spend much time on theory, and completed almost all additional stuff.

[@afreenakram2392]

any suggestions to complete this course effectively

[@kiran35179]

The opportunity to learn from such a prestigious institution like Harvard University has been invaluable. I express my sincere gratitude for offering CS50. Your dedication to making quality education accessible has opened doors for many like me to explore the exciting world of computer science.

[@GarvittSingla]

00:00:00 - Introduction 00:01:01 - AI Instructor 00:02:12 - This is CS50 00:12:26 - Computer Science 00:13:52 - Binary 00:28:00 - ASCII 00:37:32 - Unicode 00:46:39 - Color 00:48:07 - Representation 00:51:30 - Algorithms 01:00:10 - Pseudocode 01:05:10 - Thank you 01:06:13 - Artificial Intelligence 01:15:52 - cs50.dev 01:16:15 - Scratch 01:19:03 - Hello, World 01:22:05 - Hello, You 01:29:19 - Meow 01:32:10 - Abstraction 01:36:22 - Conditionals 01:43:44 - Oscartime 01:50:29 - Ivy's Hardest Game 02:00:03 - The Harvard Krokodiloes and The Radcliffe Pitches

[@pilihduha-y5s]

Link

[@glhrmmrqs]

Just finished my first CS50 lecture at 11:02pm, 06/19/2024! Really REALLY excited for the following classes!

[@kinokonik]

I watched cs50 11 years ago now an UI engineer over 10 years, thanks D.J malan

[@ayushsen6393]

what don you think software engeenering is heading towards

[@reverplusgrand]

Simply Amazing. Even if I wasn't interested in CS, I would be have watched the 2hours and been captivated the whole way through. Thank you Harvard for sharing this with the world

[@riyajath_hmd]

Just finished the lecture 0 and going to watch the other lectures consistently daily.

[@elgwaro]

Feels like being in the actual lecture room. Entertaining, engaging and it makes me stoked about becoming a computer scientist.

[@abinublitariswafimawarid3803]

WHAT IS THIS? THIS IS SO FUN, IS AND I AM NOT EVEN IN THAT HALL. IM HERE SITTING IN CAFE IN INDONESIA WHILE SCROLLING AND WATCH SOME REELS I FOUND THIS CLASS. GOD BLESS HARVARD!! GOD BLESS DR. MALAN. GOD BLESS CS50 HARVARD UNIVERSITY!!!

[@ansae5582]

I know right! I can relate to your feeling of absolute enthusiasm knowing that something like this exists for free.

[@prathamtawar1163]

49:56 they really rick rolling us

[@GrimGrinner]

Ikr why did no one else notice XD

[@thaicalisthenics2001]

I started today and see you again after finishing the course 🙏

[@AndjaDanja]

How is it going?

[@prrismm]

see you 🙏

[@KingDaddyOG]

Thank you for all the life changing work you do by providing this to the global community! ❤ Happy New Year from Indonesia. 🎉

[@yantejeda2039]

Learned about CS50x way too late in 2023, so I decided to just audit and start fresh in 2024. Love the lectures and Prof. Malan energy! This definitely has made me even more excited to learn about computer science.

[@daviddorogi2370]

Hey guys! I've just started the course and I'm going to do it all. It's unbelievable that something so high quality is free!

[@suzanneladue5828]

Thank you for posting ☺️ . Currently taking this and love it

[@thealphaclassroom]

Started This CS50x course today on 29th July, 2024, and will comment again when I'll finish this course. Really these lectures by Sir David are very interesting. Thank You so much David sir, Love from India

[@ahmetsanli9866]

Yazılım kariyerindeki en kaliteli bulduğum eğitim. Doğru yoldasınız. Tam yol ileri!

[@khandoesthings]

Hello WORLD! Please Keep ON liking this comment so my lazy self keeps COMING BACK to finish this

[@AnnaGrace-ly7wh]

Hey I started this course 2 days after you how is your experience going ?

[@Bronoulli]

Hope you’re still going! Good luck on the progress

[@ninjashahin455]

It's 19th of Aug 2024 and I'm starting this course today. I'll complete 💯 thw whole course and tell about my experience here. Beat of luck to me.

[@AnnaGrace-ly7wh]

Hello I am starting today 28th August 2024. How is your experience going ?

[@godtenderlovingcare]

This is CS50, Harvard University's introduction to the intellectual enterprises of computer science and the art of programming. Excited to dive into the world of computer science with Scratch as the first step! Thank you, Professor Malan and the entire CS50 team, for making this incredible course accessible to everyone!

[@davidjmalan]

Welcome aboard!

[@africankid.343]

​@@davidjmalan I really love your teaching methods

[@AnnaGrace-ly7wh]

@@africankid.343I am kinda stuck in binary and unary method which he did with bulbs can you explain that ?

[@djmax88games83]

I LOVE CS50 AND HARVARD, LETS HOLD CS50 ONLINE FOREVER

[@kostasrossis]

That was one of the best and most fun classes i've taken hahahah , the ending was super cool!

[@bele44]

tideman still haunts my dreams...Best course you will ever take!

[@HamzaBilal-g9o]

rewaching this gives me new ideas and help in in my programing problems this is the best lecture i have ever taken

[@natzu_faraine]

(Just notes for me) 6:56 2 languages 14:24 lenguaje unario (base 2 = binary) 1:21:47 intuo alghorith output

[@natzu_faraine]

It rises ever so slowly

[@FruityLife-mt4ql]

To actually understand a cs class and in fluent English at that sir made a really difficult thing possible. I mean we can watch English movies and all but to understand a class in another language this difficult sir really is a great teacher.thanks for these great classes 💙

[@Iam_Kady]

This will be my first and. Last cs50 class ❤❤😊i will give full time for this class

[@arminalibegovic8013]

What an animated guy. Pretty overwhelming for a classic European introvert. Enthusiasm is necessary, but this guy is showing some new levels. Hope his face didn`t explode afterwards. But still, it`s inspiring and I`m very grateful for the knowledge.

[@stanmm3405]

I am from Poland and this is very true 😂😂😂👏👏

[@araara967]

happy new year Professor Malan!🙏

[@TechVsNatureHub.]

Thank you Harvard for making this accessible to us :

[@Joe-tk8cx]

This is so awesome, what would I not give to attend it in person 🎉❤

[@lightlessflame]

just started this course!! so excited to learn :) good luck to everyone, we can do this 🖤🖤

[@anil80531]

Wish could see more of CS courses open on KZbin.

[@Taha-o6s]

The most impressive part for me is the teacher's presentation abilities

[@designstudiohq7764]

Happy New Year everyone 🎉🎉 Happy New Year to all the A+ students who are not waiting to start their 2024 New Year’s resolution 💞🥳🤩🎊🎊🤩

[@kaynatkhatib1289]

Its 1 July 2024 and I am starting this course today! InshaAllah will complete it timely. Best of luck to me !

[@pascualdanaep.4635]

🎯 Key Takeaways for quick navigation: 04:02 🚀 *CS50 is Harvard's introduction to computer science and programming, providing a versatile mindset applicable across various fields.* 06:56 📚 *The course covers not only the C language but also Python, SQL, and JavaScript, emphasizing practical skills applicable to real-world software development.* 08:20 💡 *The class focuses on problem-solving, introducing concepts like algorithms and code to represent and manipulate different types of data, from numbers to multimedia.* 09:47 🤝 *The course offers support structures for students of various skill levels, fostering a community-oriented learning environment.* 12:38 🔍 *Computer science, fundamentally about solving problems, is approached through computational thinking, improving thought processes and precision in expressing ideas.* 20:39 🔢 *Binary numbers are represented using the base-2 system, similar to how humans use the base-10 system (decimal), with each digit position holding a different power of 2.* 22:07 💡 *Explaining the binary system, using 0s and 1s to represent values based on powers of 2.* 23:33 🤖 *Connecting the concept of bits (0s and 1s) to representing instructions for computers, using the example of controlling a robot like Spot.* 26:24 🖥️ *Introducing bytes as a more practical unit of measure, with each byte consisting of eight bits, and explaining their use in representing numbers.* 28:20 🅰️ *Discussing ASCII as a system to represent letters with numbers, where each character is assigned a unique value.* 31:10 🚀 *Demonstrating the mapping of ASCII codes to letters, showcasing how binary patterns represent characters.* 39:12 🌐 *Unicode's mission is to represent and preserve all human languages digitally, capturing the entirety of human knowledge through characters and emojis.* 40:10 😂 *Emojis, represented in Unicode, can vary in appearance across platforms (e.g., Apple, Android, Microsoft), as they are essentially characters with different visual interpretations.* 41:34 🧑🏽‍💻 *Unicode uses hexadecimal representation (base-16) to express characters more compactly than binary, allowing for efficient representation of emojis like "face with tears of joy."* 42:59 🌈 *Representing diverse skin tones in emojis is achieved by modifying the default color pattern, providing variations without creating entirely new patterns for each combination.* 44:25 💑 *Emojis like "couple with heart" use combinations of Unicode code points for individual elements (e.g., man, woman, heart), showcasing the expressive possibilities of character combinations.* 45:49 🕵️ *U+ is a convention indicating a Unicode code point, serving as a visual clue for representing characters, and allowing standardization across different platforms.* 46:44 🎨 *Colors in computers are commonly represented using RGB values, with each pixel on a screen having three numbers (red, green, blue) to determine its color.* 51:53 ⚙️ *Algorithms are step-by-step instructions for solving problems. Binary search, illustrated with a phone book example, is an example of a more efficient algorithm compared to linear search.* 56:13 📈 *Binary search is a fundamentally more efficient algorithm than linear search, reducing the time complexity from O(n) to O(log n) by repeatedly dividing the problem in half.* 57:42 📈 *Algorithms can be compared based on efficiency, not just correctness. The shape of an algorithm's graph, such as logarithmic growth, indicates efficiency.* 58:09 🔄 *Efficient algorithms become crucial with larger datasets. Designing well-optimized algorithms is a key aspect of becoming a better programmer or problem solver.* 58:38 ❓ *Focus on acquiring skills to solve problems efficiently over time, not just correctly. CS50 emphasizes writing code that is both correct and well-designed.* 59:35 ❌ *The efficiency graph doesn't capture the correctness of an algorithm. Correctness requires logical analysis, while efficiency is about design and execution speed.* 01:00:32 📝 *Pseudocode is a way to express algorithmic thoughts before coding. It's written in human language, conveying steps clearly and precisely.* 01:06:42 🤖 *Large Language Models (LLMs) like ChatGPT use patterns in language to infer responses based on vast amounts of input data.* 01:10:03 🦆 *CS50 introduces an AI-based software, the CS50 duck, to aid students. The goal is to strike a balance between helpfulness and encouraging independent problem-solving.* 01:11:28 🚧 *CS50 discourages the use of external AI-based tools, emphasizing the use of its own AI software, the CS50 duck, to maintain an intellectual balance.* 01:12:56 🔗 *The CS50 duck, an AI-based tool, aims to serve as a helpful tutor rather than simply providing answers. It offers assistance within the context of the course.* 01:14:49 🤔 *Binary representation is abstracted; understanding 0's and 1's is less important than recognizing their use to represent numbers, letters, and other quantities.* [01:15:46 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🧠 The focus in this lecture is on programming ideas rather than syntax or characters on the keyboard.* [01:16:44 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🧩 Scratch, a cloud-based editor, will be used for the first homework (problem set 0) to visually represent programming concepts.* [01:17:40 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🎨 Scratch's user interface is based on puzzle pieces or blocks categorized by color, representing different programming elements.* [01:18:37 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🌐 Scratch operates in a 2D world with x and y coordinates, and the cat sprite can move based on these coordinates.* [01:19:06 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🔗 The speaker demonstrates creating a simple program in Scratch to display "Hello, world" using puzzle pieces.* [01:21:00 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🧩 Scratch's "say" block represents a function, and the white oval allows customization of the function's behavior (parameters or arguments).* [01:26:42 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🔄 Combining Scratch puzzle pieces, like "join" and "ask," demonstrates composing inputs and outputs in programming.* [01:34:46 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🔄 Generalizing Functions: By creating a function "meow" with an input parameter for the number of times to meow, generalization is achieved. This modular approach simplifies the code and enhances flexibility.* [01:35:42 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🎮 Creating Interactive Programs: Implementing conditional statements (if touching mouse pointer) and loops (forever) allows the creation of interactive programs. Demonstrated with a cat that meows when touched by the mouse pointer.* [01:39:27 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🎥 Video Sensing Extension: Extending Scratch functionality with Video Sensing allows for more interactive programs. In the example, the cat responds to the user's hand movements captured by the camera.* [01:42:20 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🕹️ Game Development: Game development in Scratch involves combining basic building blocks like loops, conditionals, and sensing to create engaging experiences. Illustrated with a "Whac-A-Mole" game.* [01:46:35 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🛣️ Incremental Development: Developing complex programs is simplified by taking incremental steps. Demonstrated through the evolution of "Oscartime," where each version added new features, making the game more interactive.* [01:49:55 URL](kzbin.info/www/bejne/aX2ze5l_gN2qjcU) *🔄 Iterative Design: Iterative design involves refining and enhancing a project through multiple versions. "Oscartime" development showcased how initial ideas evolved over iterations to create a more engaging program.* 01:51:50 🎮 *Implementation details of the game involve abstraction through custom puzzle pieces for listening to the keyboard and feeling for walls.* 01:53:17 🏞️ *Introducing an obstacle (Yale block) involves conditional checks for touching the left or right wall, adding complexity to the game.* 01:54:44 🐞 *Increasing the speed of the Yale block revealed a bug due to the fast movement, highlighting the importance of adjusting game mechanics for smooth gameplay.* 01:55:43 🤖 *Introducing MIT into the game involves MIT tracking the Harvard logo outline, showcasing the flexibility of implementing different game elements.* 01:57:10 🕹️ *The lecture concludes with a student playing the full-fledged game, demonstrating the combined mechanics of keyboard input, obstacle avoidance, and smart MIT tracking.* 02:00:03 🎓 *The presentation ends with a musical performance, "This is CS50," featuring creative lyrics about coding, debugging, and a humorous tribute to rubber duck debugging.* Made with HARPA AI

[@anthonyhernandez3546]

Reported

[@lune8839]

This comment need to go to the top

[@CS50xHenry]

Hello, World! This year, I'm turning 34 years old and just diving into software engineering. I am grateful for the ability to take this course online FOR FREE! I graduated high school in 2008 (barely) however I dropped out of junior college knowing that school was never a strong point for me. I hope that CS50 will help me start fresh with understanding how to become a better problem solver.

[@youchiro88]

today is July 21 and I started today i hope I can finish this 😇😇

[@alekbabkin9139]

this is the best lecture I've ever seen and listen to! thank you!

[@ShineEditor]

Im starting my CS journey on 2.1.2024 lets see where I will be in 2.1.2034

[@VivekKumar-zb2sx]

It was a amazing lecture. The learning was fun from start to end. Thank you Hardward and Devid to make learning easy and fun and free also.

[@AnnaGrace-ly7wh]

Hello I also just started today how is your experience going ?

[@VivekKumar-zb2sx]

It's amazing. This is the best course I have ever taken.​@@AnnaGrace-ly7wh

[@VivekKumar-zb2sx]

@@AnnaGrace-ly7wh it is going quite well ❤️‍🩹

[@gobbler1022]

"Lecture 0" I see what you did there

[@Galaxygamer92742]

.

[@AkaliWarrior]

I'm starting from CS50 today, excited to complete the course 🤩

[@BhuvanaK2007]

22nd June 2024 is my first day of class😊 from INDIAAAAA

[@allaboymm]

how is it going?