How To Use Functions In Python (Python Tutorial #3)

[@CSDojo]

Below is an outline of this video. 0:41: How to use sample files 1:41: Using comments 2:21: What’s a function? - Example 1 4:57: What’s a function? - Example 2 7:09: A function that takes multiple arguments 7:58: What’s a function? - 2 more examples 10:30: Creating a BMI calculator Also, a few tips: 1. Here is the playlist for this series: kzbin.info/www/bejne/kGK8lWqrpbamjrs 2. Follow along as I explain to make sure you understand everything 3. Ideally, work with a friend so you can help each other when you’re stuck 4. If you want to learn faster than I talk, I’d recommend 1.25x or 1.5x speed :) 5. Check the outline in the comment section below if you want to skip around. 6. Download the sample files here to follow along (they are Jupyter Notebook files): www.csdojo.io/python3 7. To make sure you don’t miss my future tutorial videos, sign up to my newsletter: www.csdojo.io/news 8. Have fun! If anything is unclear, please let me know in a comment.

[@namlehai2737]

local host... did you make all that?

[@Jass_9676]

Love from india Helpful videos

[@harisar17]

Again i hit like for your video..

[@gilangvirgiawan2780]

Ur something thanks

[@parveshkhatri7971]

Hi YK , In india we are not taught what we want . There is useless matter in our syllabus. Even many people with master degree in computer science can't create any simple application without any GUI interface help and swing controls. They teach us for marks not for knowledge. Should I learn computer science online leaving my school ?

[@emanjavascript8358]

men i watch every advertisement that comes out to my screen just to be fair by teaching us for free..your awesome men

[@warframeees8013]

Eman JavaScript watching the entire ad wont give him more revenue but a nice act nevertheless

[@aarohansharma4551]

It only gives revenue to KZbin or something I guess

[@warframeees8013]

Aarohan Sharma it doesn’t matter how long you watch the ad it’s per view, doesn’t matter if you skip the ad 5 sec in or watch the entirety

[@katharina...]

@@warframeees8013 It does matter how long a viewer watches a skippable ad for. If a viewer skips it, the uploader doesn't get paid at all, you have to watch it for 30 seconds or longer for the uploader to be paid.

[@warframeees8013]

Katharina interesting if thats true

[@kei7150]

I'm skipping school to learn coding from this guy and i gotta say it's worth it.. this dude is way better than all of my teachers

[@mikesierra14]

I am doing this aswell.

[@ragdoll312]

@@mikesierra14 *im Dont ask why

[@Zainkhan-tk7kt]

@@ragdoll312 * I'm * Don't

[@mattoucas869]

@@Zainkhan-tk7kt lol

[@buspsychologist9640]

@@Zainkhan-tk7kt * I am * Do not

[@salman2198]

Hello CS Dojo. I don't know if you are going to read this, but I just passed an Exam in Python because of you! Thank you so much! I spend like 10 hours to watch your awesome lectures :)

[@mustafaaljanabi4818]

Masha Allah! Well done brother!

[@AS-nx9fu]

@ツMoon Owner - Owner of the Moon tf is he typing like that for? 😭💀

[@joeroganpodfantasy42]

But his lecture are around 3 hours? Do you mean total watching and practicing or just watching and rewatching?

[@salman2198]

@@joeroganpodfantasy42 Sorry for the late answer. Yes, by re-watching and doing everything by myself twice to get it :)

[@ramajyello]

@@AS-nx9fu I deleted that acc 😂. Literally just stumbled upon this. Ig my path has been set in stone

[@thatwakandaboy]

I am 4 years late to this channel and 43 years late to Programming, but I am enjoying every minute of this series. Thanks YK and the entire CS Dojo team.

[@Addistoday]

😂😂😂😂😂😂😂 same here,Things happen at Gods will time. enjoy❤❤❤❤ much love from Ethiopia🇪🇹

[@ammarahmed8155]

I started watching these tutorials yesterday and I figured out by myself how to use these functions to create a program to solve the quadratic formula. I know thats probably nothing for coders but I feel really accomplished and if anyone wants to see the code I can send it to you over email. I just feel really accomplished and I wanna share it with someone. This guy is such a good teacher.

[@gabz8469]

Hi Ammar Would you be able to send the code to [e-mail] please? Appreciated..Thanks

[@YashSharma-nm1zc]

Pls share me codes

[@oblivious7045]

Why don't you just post it in the comments?

[@Aminhirari]

Be careful it’s a virus torchan

[@ykyk7771]

Post it here bruh

[@dhruvalraval8078]

You are being so helpful. Please continue with this series of python

[@youdonthaveto]

You are so helpful. I've grown up in a broke family and I don't have any money to buy course for learning Python. Your videos mean a lot to me. Thank you so much Dojo

[@FirepowerIGuess]

I'm so glad people like CS are making these tutorials for free, genuinely. I hope you're in a more financially stable condition now than before.

[@3niracer]

Learned more from you in an hour than 2 weeks of a course. Thanks for taking the time and effort. Much appreciated 🙏🏽

[@Haldiki]

Saying thank you is saying nothing at all It's the first time that I've understood programming without a sweaty forehead. CS Dojo is like a real teacher - competent and consequent. Forget other courses. Stay here, you won't regret. Kudos to CS Dojo.

[@keerthanaanandan6062]

Def comment1(): print("thanks for teaching me") print("thanks once again") Comment1()

[@rickydawn6313]

Input Error missing Positional input

[@allipse8224]

@@puchu_5001 same

[@oussematoussli8085]

Comment 1() should be comment1() not with the Capital letter

[@jinsonthekkan7420]

D should be also small letter

[@KS_Harshith]

def comment1(): print("thanks for teaching me") print("thanks once again") print(comment1()) # this is the correct code

[@legal827]

I absolutely love your videos. My father inspired me to learn programming, as in the past I’ve learned some but I’ve gathered a lot of laziness towards programming because of a lot of heavy school work. My father encourages me to just read the documentation and learn Python piece by piece, but I find that boring and hard to follow. Your videos keep me going and they are professional and clear. Instead of buying courses on Udemy, I just use your courses and they’re amazing. Thank you so much.

[@Toxicbeing8750]

how are you now doing you must be a guru now

[@tradeviper874]

Well, out of all of the different, gazillion sites and videos I have paid for and not paid for, you are, in the 61 yr olds opinion, The Best. Knowing what you are doing, and Teaching, are two different skill sets. In my business, just because you have intellect and mental ability, does not mean you will make money. You are doing quite well, starting with a base concept, then giving a practical example, then breaking it down to show how it works. Outstanding job, young man just outstanding. Also, Kudos on your English, bring multilingual myself, it can be a daunting task at times, but you have also done well here. Keep up the good work and I look forward to seeing your future success, by the way, maybe a paid forum might help keep a roof over your head? :) The Ever Kudoing VIPER

[@zumzumwater3018]

Hey Trade, My dad is 65, and his typing speed is 11wpm, anything below 30 is considered very slow. How do I get my dad to stop acting like such an old man?

[@rickydawn6313]

@@zumzumwater3018 Viagra gives you wings.

[@PeterLucasathome]

@Trade Viper, I endorse your comments. At 71, I am learning to code thanks to this young man. He is doing an excellent job. Last time I did any coding was back in the 80's, when if you couldn't write a little BASIC, you couldn't get a computer to do anything. @CS Dojo , you deserve success!

[@HHTP6]

dont worry grandpa this video alone can get 15 months of rent

[@AnonymousXvictoriouS]

@@zumzumwater3018 he is an old man

[@shahin2324]

My Professor thinks he's the real shit in Python by creating videos that are 5 hours long just to explain one concept!!!! Now, this is called a real teaching video!!!! short and informative!!!

[@elkresurgence]

maybe your prof really delved into that concept during those five hours. Short isn't always good, although in the case of this tutorial it is

[@joeroganpodfantasy42]

Maybe if your professor would release his videos on youtube people would appreciate them more. I have noticed people tend to dislike what it's offered to them locally or thru a system and they like what they find themselves online.

[@t345m]

At least yours tries my professor gives us half examples and then stops teaching 30 mins in. The class is supposed to be 3 hours! Be happy that he actually cares, unlike mine.

[@evelyn-ed7nn]

I think what is insane is that these videos were made in 2018 and I'm sitting here on the same program in 2022 and it still looks the same, still works the same, it's just so easy to use; it's incredible.

[@abdulkhadir4498]

For those who want to write a quadratic equation, I wrote a code and felt I should share this. So here is the code: def function2(x): a=2 b=3 c=4 return a*(x**2)+b*x+c value_of_my_equation=function2(-2.2) print(value_of_my_equation) Note: you can assign any value for x inside the parentheses beside value_of_my_equation=function2 and any values to a,b,c.

[@elmo890]

miles = int(input()) def convert(miles): print("KM:") return miles*1.6 km = convert(miles) print(km) Asks to type in miles when run, converts input to KM. Or remove int(input()) and set miles = "amount of miles"

[@KokkuBhanuprakash]

excellent bro😱😱😱😱

[@guiantony]

miles = int(input()) def convert(miles): print("KM:", end="") return miles*1.6 km = convert(miles) print(km) (with it stays in the same line :) )

[@epiccownerdfighter]

I know this is an old vid I'm commenting on, but you earned an instant sub (well, after 3 videos). Informative, understandable, well presented, quick. Great stuff for a beginner like me!

[@emmanuelpierre8856]

Hey YK, I from Canada, Québec, Gatineau and I speak french more than english. I am an absolute beginners on python (leaning how to code). I want to let you know that all your Python tutorial are well explained and I love following your courses cause you take your time to explain step by step and I found this a great quality and skills you have. Keep continue what you do, teaching us, sharing your knowledge and more. Your great energy will bring you where ever you want and you will get what ever you need to accomplish your goals. 👍

[@lovathon6365]

I've been self studying using another website where I bought a course on sale, and I have been struggling so much with functions that I even stopped for 2-3 weeks because I just felt so dumb that I couldn't grasp what was being asked of me... this video broke it down so nicely that after so long I'm finally able to grasp what was being said all along. thank you for making this video, it has brought me back to coding!!

[@TheNewTravel]

I was hoping you would go back and add the "is" before "not overweight', it was driving me crazy haha. Great video :)

[@phamgiaminh6496]

You are learning Python, too? =))

[@ivanreyes7770]

Tks i already do it

[@PNCNDNOB]

haha same here.. i did it on my end tho.. lol

[@oskarwitha_k8258]

Wdym, he did change it

[@devonchin94]

def convert(miles): return miles*1.6 km = convert(int(input("Enter miles here: "))) print(str(km) + " km") I decided to take it one step further with the challenge. Allow a user input to convert miles to km, and convert that integer to a string to show the km after the value! Thanks so much for these videos! I am absolutely loving learning python3 (my first programming language). And having passionate people recording tutorials like this really helps more than I could ever put into words!

[@rakotai9998]

honestly i did the same thing the reason i took a step further was cuz the actual challange was too easy and tried to make a user type the miles and it convertes it to km and i was bout to paste the code in here but guess I was slow. LMAO you got me.

[@vasileafloarei251]

def functie_km(km): return 1.6 * km print("conversis km in mile") a = functie_km(4) print(a)

[@pranithsukhavasi2502]

return 0.6*km(correction)

[@am_sf6574]

@@pranithsukhavasi2502 it's not 0.6 though

[@Dark_dragon1212]

why not just do def convert(miles): print("converted km in miles") return 1.6*miles convert(4) I assume conversis is a synonym for convert or converted.

[@dansmith9406]

5 years later and this video is still amazing! You just helped a total noob complete part of the cs50 course with this video. I had no idea how to do mapping with a function. Perfect explanation. Thank you

[@nzehemmanuel3774]

I’m Emmanuel from Ghana and I was thinking about how to start my semester Computer programming. I didn’t know what to do but from the fews videos I have been watching from your site . I very motivated to do this course. Thank you soo much for giving me this foundation 🙏🙏

[@milittt]

The best part: Running a code without error 😑😑😑

[@AQ-101]

@Loai Alghamdi yes 😁

[@am_sf6574]

Def convert(x): Return x * 1.6 + " km" Km = convert(5) #5 miles Print Km

[@khytron06]

And you can also ask the user for an input : def convert(x): print(x*1.6+"km") a=int(input("Distance(miles): ")) convert(a)

[@builder481]

def convert(m): return m * 1.6 km = convert(8) print(km) I also made this it convert feet to cm def hight(length): return length * 30.48 tallinCm = hight(6.4) print(tallinCm)

[@Rinaa966]

My solution ^^ def convert(mile): km = mile * 1.60934 return str(mile) + " mile is equal to " + str(km) + " km"

[@rafnael8807]

just add the print(convert(x)) statement

[@pharmacist2576]

@@rafnael8807 what about: def miles_km_converter(km, miles): km = 1.6 * miles print("km ") print(km) miles = 5 miles_km_converter(km, miles)

[@joemorris6544]

I have been following along with Python Crash Course book in my spare time and anytime I get stuck on a problem or don’t quite understand what I’m doing I always come to your channel. This video helped me understand functions a lot more.

[@AAsisters84]

After searching on KZbin for 30 minutes, This video was the only one that really helped me understand how to use the functions. Thx a lot.

[@kennethchin278]

I thought the overview of functions was excellent. Covering what one can use functions for, quickly and concisely, ( be it mappings and returning calculations. ) as well as using of strings. Much appreciate. I've watched a few online Python vidoes and it's nowhere near as sysynced and easy to understand with useful examples as yours. Keep up the good work.

[@droidzz4935]

Here is the function: def convert(miles): km = 1.6 * miles print("km: ") print(km)

[@zz-nj1bq]

ok

[@ThErrandBoy]

@akash anil he's not wrong, you just have to call the function cos he didn't assign it to a variable (since he used print and not return.) and he should have said km = 1.6/miles not 1.6*miles.

[@michaelegiebor524]

Should have used return argument instead

[@rahmats.8913]

it's not a function

[@droidzz4935]

@@rahmats.8913 ？

[@agamgujral5696]

I did: def km(x): return (1.6 * x) Miles = km(20) print(miles) 32

[@khalanesachin]

Yours is also right but you managed it little differently than he asked .. What he is expecting (in my opinion) is as follows... def convert(miles): return miles*1.6 km = convert(100) print(km) 160.0 Which means 100 miles= 160km

[@TollpatschZ123]

@@khalanesachin Yeah makes more sense that way. Thanks for sharing.

[@LaxmiGupta-cl2go]

def miles(x): return 1.6*x y= miles (45) print ('y=', y, 'km') y= 72.0 km ( I prefer it with unit, hence) Your teaching is really good. Thanks YK!

[@saganmcvander636]

@CS_Dojo Wow you actually explain functions properly unlike the thousands of 30 minute youtube videos that never explain any of this properly.

[@orthodox8224]

def convert(miles): print(1.6*miles) miles = int(input("Enter miles :")) convert(miles)

[@brasoveanuionut3207]

And what if i input 10.7 ? Answer : Not working, Xd

[@shashiverma6219]

Love from India bro..I learned PHP year ago ..and at that time I was keen to learn python..but didn't happened.. I did 2 months job as PHP developer in a small company..I left..coz i thought it's not that's I want..but after watching ur another videos and that python series..I think I can do this..thanks for uploading the videos ..and keep uploading bro..thank you so much brother.

[@diogo8386]

Hey man, how many time you took to learn php and to get the job?

[@OsadeTOOT]

i thought you said "love you indian bro" lol

[@paulovinicius5833]

Best functions classes I've ever seen. Congrats!

[@geniushalo5473]

You mean "Thanks"?

[@RealSpyduh]

@@geniushalo5473 ahahahahah yeah i think thats what he meant XD

[@geniushalo5473]

@@RealSpyduh Yeah xd. Its kinda wierd to congratulate someonw

[@delubiod1970]

@@geniushalo5473 We Brazilians Congratulate everyone who does that extra mile when teaching. He deserves to be Congratulated. Don't you think? Teaching is hard. When someone teaches a topic so easy, just thanking him will sound like an understatement to his effort, I guess....

[@HipsterBrooo]

Bro I feel like I've browsed through a gazillion videos on Functions and only this video helped me. THANKS A TON😭

[@fryaadil1687]

Just started learning Python as a hobby. I have no programming experience but I am really enjoying it so far. Thanks, man. Your teaching method is really good.

[@xmisteralex]

I did: def convert(miles): return 1.609*miles km=convert(150) print("km =",km) km = 241.35

[@swallowedinthesea11]

Nice! 06302020

[@lzcracker]

This is the most clear, concise explanation of python I've found, thank you so much for the hard work. :)

[@siddhijha894]

YK 😁😍 thank u and keep working over it ,u r an awesome teacher 😂

[@ankixsounds]

Siddhi Jha hi

[@aakilahmed8649]

an awesome teacher tho

[@ryz3nplayz364]

no not awesome... ITS THE BEST teacher

[@MrMikeIppo]

Sir, you are the most helpful teacher I have found online: def CS_Dojo(): print("instant Like") print("instant Subscribe")

[@joseph5166]

I love that you can see even a simple function can be performed in all sorts of different ways from the comments here. Here's what I got: def convert_miles_to_km(miles): km = 1.6 * miles print(miles, "miles is equivalent to", km, "kilometers.")

[@Chucky5525]

My miles to kilometer converter: def convert(miles): return 1.6 * miles def temp(x): return 1 * x a = convert(4) x = 4 print(x) print(a) print(x, "miles is", a, "km")

[@richardd5587]

Really good series. Thought I'd dip into Python as it's the language used in my nephew's school and he will be taking Computer Science next year. As a retired Science teacher with a lot of experience coding in VB and VBA I've found the presentations very clear and rarely miss a trick (like the importance of the number of leader spaces!). Although I was using PyCharm I now think the Jupyter IDE has the edge for younger students.

[@noflare1714]

You cannot imagine the amount of joy I felt when I converted km to miles😂😂😂😂

[@chernobylcoleslaw6698]

Nah I scream for joy when I nail some code; even if it is basic af.

[@celineangelina2697]

howw? can you post it here?

[@ShreyasV0]

@@celineangelina2697 def convert(miles): print(1.6*miles) miles = int(input("Enter miles :")) convert(miles)

[@MinotaurvsCyclops]

@@celineangelina2697 KM to MILES (my way): def convert(miles): km = miles / 1.6 print(f"This is the amount in miles {km}") miles = float(input("Enter KM here: ")) convert(miles)

[@eleenasen4290]

@@chernobylcoleslaw6698 OMG same I was like YASSS IM NOT DUMB lolol

[@MAFABI-g7e]

These tutorials for YK are making me to improve day and night on python

[@supersoniq4102]

I was having a tough time understanding Functions from my other teachers since i'm new to .py. In Less than a Minute you've made it seem like ABC. You are a genius!!

[@shree2710]

Its like waiting for the new episode of your favourite anime, only the difference is that you dont know when the new episode is gonna be dropped.

[@Ahmedcoday]

loooool

[@rakotai9998]

LMAO! i am currently watching Kenja no maga , Kimitsu no yoba , fairy tale: final season and thats all

[@77shaiksultan]

You can't compare anime with this

[@kennyg1953]

Idk man I've been waiting for Naruto Ep 501 for a while.

[@Red-yq6nc]

@@@kennyg1953 Fam naruto is over, now they have a half assed series named boruto which is basically like naruto filler but its cannon

[@tyres9]

def convert(mile): km = 1.6 * mile return str(mile)+ " miles is " + str(km) + " kms" a = convert(float(input("input distance in miles: "))) print(a)

[@pilgrim273]

print('hello yk') name = tom print(name) print('here and i want to thank you for the videos you create which are much better than how my teachers teach at school'')

[@sultanmahamud7134]

You just helped me with something i was stucked for long

[@martijnvangelder1902]

Thanks bro, your calm demeanor made me understood functions immediately. I'm a guy studying chemistry, and have to take a class in python. I hope I pass, and if I do, it'll be because of your videos.

[@PNCNDNOB]

learning so much here, i am going to get a official course on Pyhton (because i have to do some studies or work from the government here in the Netherlands), so i think that is going to be way easier now.. thanks a lot! as soon as i get a job again i am donating some money to you bro!!

[@xodiaki]

my solution: miles = int(input("Enter the amount of miles you'd like to convert :")) def convert(miles): return miles * 1.6 km=convert(miles) print(km) kms=int(input("enter the amount of kms you'd like to convert :")) def convet_km(kms): return kms/1.6 mile=convet_km(kms) print(mile)

[@rinovichaz3168]

If you convert your input as float instead of int it will be more accurate i think. I tried ur code using the input of 100.99999 an the conversion was a little off... using a float instead of an integer will not ignore decimals and therefore will give you the most accurate result. But ur code helped me out a little so thanks

[@xodiaki]

@@rinovichaz3168 you're welcome and yes float will work better !

[@Strawhaty]

@@xodiaki surely your code would work without the miles? why use them??

[@xodiaki]

@@Strawhaty what do u mean lol

[@adzefeabdulraman652]

I have been missing a lot.I just subscribed to your channel yesterday. I'm enjoying it.God bless you

[@dukhtarakhtar]

I tried after taking your 2 classes nd boom feeling like an expert btw it's my 1st programming language that I'm learning

[@harshp2577]

I've watched this video like 5 times trying to understand why the bmi code works the way it does. Finally got it

[@shubhamkawade317]

so it's dec 2019, i know i'am late, but you saved me. thank you so much!

[@allridio]

Def convert(miles) Km = 1.6*miles Print(miles) Return km M=convert(any value) Print(M)

[@xxss97ssxx]

mil = input("Enter miles: ") miles = float(mil) def convert(miles): km = 1.6 * miles return km conversion = convert(miles) print(conversion)

[@alokpatnaik692]

1 mile = 1.6 km So 1 km = 1 mile/1.6

[@KrolPower]

You can also combine your first two lines to simplify and organize a bit better. Ex: miles = float(input("Enter miles:")) That way you don't have an extra variable to keep track of.

[@elantris-2002]

@@KrolPower I did it like this lol xD x = 1.6 def c1 (x, y): return 1.6*y and print (1.6*y)

[@KrolPower]

@@elantris-2002 lmao

[@elantris-2002]

@@KrolPower but it works 😂

[@goodnessgideon8960]

wasn't understanding but later got a hang of it, cs dojo is the best coding tutor thanks

[@tasneemalshamsi1852]

U don't even know how much this helped me .. I couldn't get the idea of this def thing until I saw ur vid and I'm so thankful that God leaded me to u .. seriously THANK U

[@evelynwang4818]

wow i learned more in the first 3 vids than i did taking a four week summer camp python course. thank you so much ! im in eighth grade and this understandable even for beginners.

[@QazDiaries]

Def convert(miles): print (miles, "miles is", km, "kilometres") return 1.6 * miles km = convert(miles) convert(2) print(km) 2 miles is 3.2 kilometres

[@KokkuBhanuprakash]

that's wrong bro

[@KokkuBhanuprakash]

u typed "D"instead "d"

[@tamejamu7522]

showing name miles is not defined

[@centerofmotivation1904]

Here's the code I made for the conversion of miles to km's: loop = "Y" def conversion(miles): kilometers = miles * 1.609345 return kilometers while loop == "Y": try: miless = float(input("What are the miles you are trying to convert to kilometers?: ")) print(conversion(miless)) loop = input("Would you like to convert another number Y or N?: ").upper() except ValueError: print("That is not a valid input") print("It was nice converting numbers with you see you some other time.")

[@mukhtarabdi8731]

Thanks Sir for your introductory course to Python. I am a novice in python but have R prgoramming background. You made the whole learning process easy. here is the exercise which I have tried: # Write a function that converts 100 miles to km def conv_miles_km(miles): km = miles * 1.6 print('100 miles is equal to {}'.format(km)) # return km # call the function conv_miles_km(100) 100 miles is equal to 160.0

[@TatTvamAsi173]

def convert(x): return 1.6 * x x = int(input("Enter the dist in miles: ")) e = convert(x) print(f"The dist is {e} km")

[@oleksandrherasymenko3167]

So love your "Ahhhhh" stuff.

[@Tait1990]

def convert(miles): km = 1.6 * miles return km converting_miles_to_km = convert(3) print (converting_miles_to_km)

[@diemausdietastatur8738]

well after 4 months :D but id say this is better def convert(miles): return miles * 1.6 print(convert(4))

[@elmo890]

@@diemausdietastatur8738 This is the way I did it, you input miles and it converts the input to KM. #Miles to KM miles = int(input()) def convert(miles): print("KM:") return miles*1.6 print(miles) km = convert(miles) print(km)

[@elmo890]

Or: miles = int(input()) def convert(miles): amount = 1.6 print("KM:") return(amount * miles) km = convert(miles) print(km)

[@hashpants8034]

Could you please explain RETURN in more detail please.

[@swallowedinthesea11]

Return value gets stored and saved into a variable. def addSum(num, num2): return num + num2 answer = addSum(500, 100) # answer = return 500 + 100 # answer = return 600 # variable answer is now equal to the return value 600.

[@koconutto]

I Didnt understand return very good

[@WhoForgot2Flush]

If anyone still needs helps, just think of a return as the value of the function. For instance at the end when he writes... km = convert(miles) you know the "convert" function will need to return something, can be an integer or a string or anything, because you are storing the returned value of the function to a variable. If you did not have a return in the convert method you would not be able to store it to a variable. Inside this function would be... return 1.6 * miles if you didn't put the return there it would still execute the code but you would not be able to say km = convert(mile) since the function would not be returning anything.

[@KlimYadrintsev]

Mike Naples thanks

[@KlimYadrintsev]

11swallowedinthesea thanks

[@bartkornacki3590]

CS Dojo you put things into the plain explanation-something that the other tutorials lack

[@shudanhao8643]

Thank you so much. i am a new learner of python, the return and function are really confusing for me. This video perfectly explained them for me. Keep up the good work!!!

[@Akuphakpa]

Finally i got this video. I has been waiting from your last video(if else statement )thank you so much yk ..

[@sagnik0397]

miles=int(input("Enter distance to miles: ")) def conversion(): km=1.6*miles return km print("Distance in kilometres is ",end="") print(conversion()) #lemme know if I am correct or any way to improve the code.

[@simeonnenov3499]

miles=int(input("Enter distance to miles: ")) Instead of int, you can put float, so that the code does not crash when someone enters a number with a "." Like 100.2

[@sagnik0397]

@@simeonnenov3499 yeahhh thanks a lot for helping

[@AntiagingVideos]

Hi dojo and thank you for the great tutorial. When you say "a function is a collection of structures". What is a structure? Thank you!

[@logantucker1835]

Watching this at the gym. Way more helpful than the class I’m taking

[@scorpiomischief]

I have been on app after app and watched tutorial after tutorial, but this is the first video I've seen that explained things clearly and directly using simple terms I could understand. I'm going to be a subscriber of yours forever now! You definitely have a gift for teaching. So many folks in computer science (even if they're brilliant coders) have difficulty explaining their process in a concise way. So thank you; you're a life saver! I'm going to go turn off my adblock now and re-watch this in gratitude :)

[@TrueMathSquare]

Thanks this is great.

[@TheHyrossl]

Here is my solution: def convert_km(miles): return 1.6*(miles) def convert_miles(km): return km / 1.6 x = convert_km(20) y = convert_miles(10) print(x) print(y)

[@examupdates3977]

Great

[@charliepickford8554]

What I did was: milesinput = 13 def converter(miles): return (miles * 1.6) d = converter(milesinput) print(milesinput, "miles =", d, "km")

[@sippincay]

i did km = 5 def convert(miles): print(“miles: “) print(km * 1.6) result1 = convert(miles)

[@Kemachris]

'''very clean i like it! Mine is a bit clunky and only goes one way, but atleast i made it take user input :p ''' miles = int(input("How many miles would you like to convert to KM's? ")) def km(miles): km = miles * 1.6 print((round(km,2,)), end="", flush=True) print(" KM's") km(miles)

[@drdre1964]

Here's mine. def convert(miles): print(miles," miles is ",miles*1.6," kilometers") def convert2(km): print(km," kilometers is ",km/1.6," miles") a=convert(100) b=convert2(160)

[@72prabhatkumar91]

Sir i am big fan u......i have watched your all video....thanx

[@gabrielmoreno3027]

PRABHAT KUMAR now watch some english tutorials, thank you.

[@peyushbht7982]

lmao

[@ajithsdevadiga1603]

@@gabrielmoreno3027 as if you are from Oxford 🤣🤣

[@gabrielmoreno3027]

@@ajithsdevadiga1603 Oxford = English??? XDDD are you kidding me

[@kingsleyosuala1423]

Thank you so much CS Dojo, I have learned a lot from your tutorials. did the assignment, that converts miles to kilometer and also from kilometer to miles. I went further to ask the user for input. unit = str(input('What do you want to convert? Enter m for miles or k for kilometer: ')) distance = eval(input('Enter distance: ')) km = 1.6 * distance miles = distance / 1.6 def convert(): if unit == "m": return km elif unit == "k": return miles result = convert() if unit == "m": print(distance, "miles is equal to: ", result, "km") elif unit == "k": print(distance, "kilometer is equal to: ", result, "miles") else: print("Invalid unit or distance; enter m for miles or k for a kilometer and enter distance as a numeric value")

[@avikghosh5112]

my answer: def convert(miles) return 1.6 * miles km = convert (10) print(km) 160. thanks CSdojo!

[@briangrey4849]

bmi_calculator(name, height_m, weight_kg): bmi = weight_kg / ( height_m**2) so here arguments/variables are name, height_m, weight_kg and name1, height_m1, weight_kg1 are different than name, height_m, weight_kg then when return result, how bmi knows that it has to do weight_kg1 / ( height_m1**2). i think it should only work for weight_kg, and height_m values as that values are in function and in bmi formula. weight_kg1 ,height_m1 are totally different values than weight_kg, height_m then how it works ?

[@albertoavena]

brian grey I have the exact same question and I'm been trying to figure it out for 2 days now! Where is name, height_m and weight_kg getting the values from if the three people you defined have different names??

[@maamooon7910]

well im not the only one through 😂

[@jaydebbhunia3676]

hey, Change the name of def value (name, height_m, weight_kg) to (a, b, c) still it will work - because that is the condition which is assigned to def function

[@michaelmartinez8470]

name, height_m, weight_kg are parameters that live inside the function bmi_calculator, used to calculate the bmi. you can think of them as "this" and "that" and "alsothis" or "a", "b", "c" or "x", "y", "z". they're just arguments; the function uses "three things". it calculates bmi by using (c divided by b**2 (or b squared)) and returns "name" or "this" or "a" or "x" + a printed string. it also "returns" a new value bmi but does so by printing it as a string, so it might be confusing. bmi still lives within the function. "result1 = bmi_caculator(name1, height_m1, weight_kg1)" is like saying "call the function bmi_calculator (which accepts three parameters), and execute it and assign to variable result1". it assigns result1 by plugging three arguments or parameters into the function. in result1's case its plugging in "YK" for name in bmi_calculator(name, height_m, weight_kg), "2" for height_m in bmi_calculator(name, height_m, weight_kg), and "90" for weight_kg in bmi_calculator(name, height_m, weight_kg). the confusion is probably coming from the parameter names being named similarly to the variable names. name1 could have been a variable t = "YK" and height_m1 could have been u = "2" and weight_kg1 could have been v = "90" and it could have been "result1 = bmi_calculator(t, u, v)" and it would have worked exactly the same.

[@nathanst-laurent8583]

NameError Traceback (most recent call last) in () ----> 1 result1 = bmi_calculator(name1, height_m1, weight_kg1) 2 result2 = bmi_calculator(name2, height_m2, weight_kg2) 3 result3 = bmi_calculator(name3, height_m3, weight_kg3) what do I do?

[@user_z11]

yeah same

[@user_z11]

ok this comment is 2 year old did you get it

[@George-pt2ot]

@@user_z11 lol

[@anemawbishaw2827]

It's harder than i thought 😨

[@siyandavilakazi781]

That's what she said

[@paulmulderry3788]

Thanks for taking the the time to explain syntax in python tutorials. I find your approach to teaching encouraging.

[@sagharxatami6648]

I'm in love with your explanation. everything was obvious and understandable, but one point to those who actually code the same thing in their editor, if you run the program and don't get the result, try to read it one by one like python does and also pay attention, that if you actually haven't mentioned the value of your parameter in your function. After all, python won't understand if you use or call it in your function because everything you type in function is counted as the function's work so try to check out to make sure you didn't make that mistake and to make sure, you can basically look at your code to see the spaces and if there are 4 spaces where you mentioned the function it means you have called it in a function and to solve that problem you can go ahead and delete those spaces to begin from the beginning of the line. hope u understand me well.

[@simantoahmed9849]

I still don't understand that "return" string. Once called in function it appears but when calling BMI calculator, it doesn't appear until result1,2,3

[@raves_r3177]

the bmi calculation is already printed inside the function.The return does not print in the terminal unless printed in the main code. It's just like calling a built in function x = upper("hello"), you dont leave it like that because it does not print itself. you have to print it using print(x).

[@arjunjain87]

Because by using the return function we are 'returning' or 'assigning' the value to result1,2,3 or any other variable, it is just like, a = 5, so u will get 5 when u print(a) instead of when calling the function. Hope this helps. . . .

[@rubikulelerubiksandukulele4607]

Is my code correct? When I run it, I got 32 :-) def mile(km): return 1.6*km print (mile(20))

[@Xous_]

Miley Blutatu no it’s a = mile(20) print(a)

[@ToshDeCamerz]

@@Xous_ mileys code is much more efficient and writing a=.... Is unnecessary

[@Cmog884]

I feel like I can remake skyrim

[@rdenel7126]

killleeed me xDDDDDD I FELT LIKE I COULD FIX CYBERPUNK GLITCHES

[@levnikitin7432]

@@rdenel7126 damn i think even for world's most infamous coders fixing cyberpunk would be difficult

[@cybernerd7492]

Yes

[@matmattarayao1277]

@@cybernerd7492 sup cyberfucked

[@cybernerd7492]

@@matmattarayao1277 sup dog😎

[@jieweikwan]

Hello YK! Just wanted to say I hardly had any interests in other videos - eg from Coursera as they were usually not straight to the point. But your videos keep me going n the step by step allows me to imprint the steps into my head! I think this is really important for someone who can’t listens to Long lectures and am really thankful to have found your video 🥺

[@noorfatima1642]

Miles = input("enter in miles ") Mil = float(miles) Def km(m) : Print ("distance in kilometres is ") Return 1.6 * m Result = km(mil) Print(result) This take the input from the user So so happy 😁

[@valdemarcarl5501]

I have an ongoing course on Python basics. The user defined functions are discussed in two lessons: kzbin.info/www/bejne/rafPg3x3hZmjjMk kzbin.info/www/bejne/in_aY6qgabR8g9U The complete playlist of ongoing Python basics is: kzbin.info/aero/PLWF9TXck7O_wMDB-VriREZ6EvwkWLNB7q

[@saiyamnahata8510]

14:30 1 mile = 1.6km and not the reverse

[@OriginalEch3Official]

you jusr said what he said dumbass

[@InsaneI]

4:25 I hope they werent executed. I dont like seeing lines being killed

[@atiyanimmi7243]

im dead 😂😂😭

[@thejackgoldenbergsho]

Hi, I am not that knowledgeable, but in minute 9:30 in this #3 Functions video, it is not clear why when you run the program a second time and call the function, the number 12 appears as a calculation but without the other two print commands.... WHY NOT?

[@liquidsunsets194]

if you run the function it will print the first two print commands but for the last return command its evaluating some value and return it as an output .. in order to print that value you have to assign it to a variable and then print it ... if you try to do these steps with a function that has no return command you’ll get (none) as in no output bcs you didnt include it in the function I hope this makes any sense but think of it as having a calculated value that you want to print but first need to assign a variable to it ^ ^

[@jeremyeltoro4693]

km= float(input("insert amount in Kilometers: ")) def miles(x): return x / 1.6 e=miles(km) print(e, "miles")

[@alexisdelgado8737]

THANK YOU I am taking a machine learning course this fall and I currently am learning python still and you explain so well i am learning so fast