6. How to program in C# - FOR LOOPS - Beginner Tutorial

[@kvd2018]

There are 2 basic shortcuts for lazy programmgers like me : cw tab tab (makes Console.Writeline and safes like 2 seconds) for tab tab (creates the for loop which safes about 6-10 seconds)

[@dangerranger4780]

he told this thing in Arrays part :D

[@1989Lachapelle]

Thank you for the advice.

[@LegendaryWizardPS]

Amazing

[@sakurachan9088]

Cyu Agen saw your name on a meme on Fb

[@danzheen]

Thank you!

[@varunramakrishnan2284]

"I've been really busy with some projects" *moves minecraft to hidden stuff folder*

[@icx8417]

You get it !!!

[@magnusm4]

+Varun Ramakrishnan he's been working on minecraft mods XD

[@ghostinclouds4311]

+magnusm4 maybe or he was doing stuff with command blocks it's kinda similar to koding

[@Phantom-pr7xq]

xD

[@Mega-ch5ku]

Alex Suxiashvili nah it isn't similar

[@vikkosti]

You should mention that the declared variable in the for loop is only local and can't be used outside the for loop

[@Brackeys]

+Victor Franjo Yep, thanks for pointing that out :)

[@vikkosti]

No problem, thank you for the excellent beginner course!

[@gunzdevelopers]

for (;;) { console.writeline("spam"); }

[@gwaur]

I've been doing random PHP scribblings for the past, like, ten years, and I'm starting to pick up more serious programming again, starting from scratch. These tutorials bring back great nostalgia from 15-20 years ago when I did stuff just like this with QuickBasic and I was so happy. Thanks, Brackeys!

[@brokenglass1330]

I just did this: for (int i = 0; i

[@eaglebaize]

Learning C# to assist my team in a project class. These videos are wonderful! Thank you so very much! Next thing to study for the project: Unity.

[@kevmscotland]

"Busy with important projects...." *Deletes Minecraft shortcut. Busy indeed.....

[@nachohotdawg5634]

where r u 5 years from this comment now?

[@kevmscotland]

At the time of posting. I was finishing my honours degree in computer science and learning from resources such as @brackeys. 5 years later, I'm a Senior Software Engineer. Thanks for asking.

[@nachohotdawg5634]

kevmscotland Cool man! Good luck with that!

[@Tobyodd]

where r u 5 months from this comment now?

[@parkercarron4940]

I did the challenge by simply writing for(int i = 0; i

[@algemmegla9002]

Regarding exercise "determine if it's an even number": Another way might be: If i /2 == int (i divided by 2 equals a whole number), then the variable is even, so continue to print and increment...else { etc, etc. } Probably would be more typing though, and I'm not sure it would understand "integer" in this syntax. But perhaps there's a way to say equals a whole number as an "alternative" to returning the remainder. (In other words, 2 divided by an odd number isn't going to return a whole number.)

[@zilverman7820]

nope if the i is incremented it will not be == 0 anymore.

[@Kelisei]

I know this video is old but it will be more easy to create three Random classes one for the numbers, one for the wrong answers and another for true?, that work for me exactly as the video do and I think it's a little more easy to understand for novices.

[@tomzlisavanovic5865]

I practiced the switch command a little. Thanks for awesome lecture! else { int diff = Math.Abs((c - (a * b))); switch (diff) { case 1: Console.WriteLine("You were so close"); break; case 2: Console.WriteLine("Close enough"); break; default: Console.WriteLine("Not correct."); break; } }

[@supertunes9860]

me seeing this in 2020 and started thinking that he said that he was sick maybe corona but again i realized that this video was uploaded past 6years

[@louellabarrot5974]

console.writeLine("Enter comment: "); string a = console.readLine(); Enter comment: Thaank you so much for ur vids and inspiring us, new developers. 😇

[@nuclear7622]

I don't understand the concept of "i++". I still have no idea how that makes sense. But I understood very easily how the "i += 1" works. Thanks for telling that way of of doing it too. and the even number challenge I realised that you could just do i += 2 instead.

[@DriitzzCabal]

i++ is the same as " apple++ " it's just a variable you named, but in this instance with the " ++ " it means it will repeat itself until the value set before it is met, "for" is a loop , " for every green apple you see , take a bite until there's no more green apple"

[@masa5300]

I did the same thing the op said, though Brackey used a different method to print out the even numbers which I noticed in his next vid.

[@npacker7045]

Amazing explanation at 4:40

[@pepis1132]

What i did for the previous video challenge was: using System; namespace ExamendeMatemáticas { class MainClass { public static void Main(string[] args) { Random numberGenerator = new Random(); int num01 = numberGenerator.Next(1, 20); int num02 = numberGenerator.Next(1, 20); int num03 = num01 * num02; Console.Write("Multiplica " + num01 + " y " + num02 + " "); int sol = Convert.ToInt32(Console.ReadLine()); int num04 = num03 - sol; int num05 = sol - num03; if (sol == num01 * num02) { Console.WriteLine(); int Correcto = numberGenerator.Next(1, 4); switch (Correcto) { case 1: Console.WriteLine("¡Enhorabuena has sacado un 10!"); break; case 2: Console.WriteLine("¡Perfecto!"); break; default: Console.WriteLine("¡Muy bien!"); break; } } else { Console.WriteLine(); if (sol < num01 * num02) { int Incorrecto1 = numberGenerator.Next(1, 4); switch (Incorrecto1) { case 1: Console.WriteLine("Has suspendido... Te han faltado " + num04 + " para obtener el resultado"); break; case 2: Console.WriteLine("No has aprobado... Te han faltado " + num04 + " para obtener el resultado"); break; default: Console.WriteLine("Puedes hacerlo mejor. Te han faltado " + num04 + " para obtener el resultado"); break; } } else { int Incorrecto1 = numberGenerator.Next(1, 4); switch (Incorrecto1) { case 1: Console.WriteLine("Has suspendido... Te han faltado " + num05 + " para obtener el resultado"); break; case 2: Console.WriteLine("No has aprobado... Te han faltado " + num05 + " para obtener el resultado"); break; default: Console.WriteLine("Puedes hacerlo mejor. Te han faltado " + num05 + " para obtener el resultado"); break; } } } Console.ReadKey(); } } }

[@danielbeckerton7418]

Thanks for all of these great tutorials Brackeys. You explain everything you're doing very well. Great video!

[@woosix7735]

For (int i = 1; i< 100; i += 2) { Console.WriteLine(i); } Much better than checking each time for unevenness

[@boteagao8465]

Really great videos help me a lot! hope I'd see these earlier...

[@d34ddud3]

I didn't do the showing how far off thing, but what I did do was write it to randomly select between adding, subtracting, dividing, or multiplying the two numbers. It repeats the users answer to them if they're right saying it's right and if they're wrong it'll say the answer and repeat what theirs was. If you want to see how I did it, here's the code: using System; namespace FirstConsoleProject { class Program { static void Main(string[] args) // This is a method called "Main". It is called when the program starts. { begin: // A flag to be referred to later in the program. Referred to on [lines 28, 33, 45, 50, 62. 67, 79, and 84]. Random numberGenerator = new Random(); double num00 = numberGenerator.Next(1, 5); // Generates a random number 1-4 and sets the double "num00" for [line 16] to determine which case to go to. double num01 = numberGenerator.Next(1, 11); double num02 = numberGenerator.Next(1, 11); switch (num00) // Utilizes the variable set on [Line 12]. { case 1: Console.WriteLine("What is " + num01 + " plus " + num02 + "?"); double answer = Convert.ToDouble(Console.ReadLine()); // Allows the user to input a double variable of their own. double num03 = num01 + num02; // Creates a another double variable adding the doubles from [lines 13 and 14]. if (answer == num03) { Console.WriteLine(answer + " is correct."); goto begin; } else { Console.WriteLine(answer + " is incorrect. The real answer is " + num03 + "."); goto begin; } case 2: Console.WriteLine("What is " + num01 + " minus " + num02 + "?"); double answer1 = Convert.ToDouble(Console.ReadLine()); double num04 = num01 - num02; if (answer1 == num04) { Console.WriteLine(answer1 + " is correct."); goto begin; } else { Console.WriteLine(answer1 + " is incorrect. The real answer is " + num04 + "."); goto begin; } case 3: Console.WriteLine("What is " + num01 + " times " + num02 + "?"); double answer2 = Convert.ToDouble(Console.ReadLine()); double num05 = num01 * num02; if (answer2 == num05) { Console.WriteLine(answer2 + " is correct."); goto begin; } else { Console.WriteLine(answer2 + " is incorrect. The real answer is " + num05 + "."); goto begin; } case 4: Console.WriteLine("What is " + num01 + " divided by " + num02 + "?"); double answer3 = Convert.ToDouble(Console.ReadLine()); double num06 = num01 / num02; if (answer3 == num06) { Console.WriteLine(answer3 + " is correct."); goto begin; } else { Console.WriteLine(answer3 + " is incorrect. The real answer is " + num06 + "."); goto begin; } } } } }

[@rAVENisntREAL]

OMG I finally figured out why he is Brackeys. The logo is two brackets. Brackets -> Brackeys!

[@ibogdan28]

you could do the same thing just by typing: for (int i = 0; i

[@InspiredProductions1]

I was waiting for the whole time haha, so happy it's here :D

[@MrDutchstyler]

Great video you are a great teacher. And the list with even numbers was done in less than a minute :D It`s look like a lot of PHP programming but I really want to learn C#.

[@gutsberserker5476]

There wasnt anway i could solve challenge on video 5. as math.abs is a new syntax that you just introduced. How we ment to know this if we noobs :( p.s love your videos

[@elgroxo]

Thanks for taking the time to make those awesome videos!

[@galeelraglen]

You are a great teacher!!! Thank you so much :)

[@magnusm4]

Your tutorials are the most helpful I have found yet as you actually explain what ( ) does. I wish my teacher recommended this instead of mr one buying. ps. if you can answer this, have you uploaded a tutorial on how to import objects from for example maya and into Unity and how to add custom animation to them made in for example maya?. The main thing I have been planning to do is add two objects with collide in order to be able to interact with them but add a "health" bar to each piece to make them split to their own individual part. Just wanted to say that.

[@Shannxy]

+magnusm4 Did you find the information you needed? and where

[@magnusm4]

***** sadly no. I figured out how to import the objects but not animations yet.

[@rydiaofmist8190]

When you declare a variable to increment, does it have to be declared within the for loop? Like *for (int a = 1; etc; etc) {}* Or can I declare it outside, like this? *int a;* *for (a = 1; etc; etc) {}*

[@StranzaZA]

i couldn't use Xamrin studios so instead I've used visual studio for a run around

[@JordyAuto]

Hey Asbjørn, do you think you could do user input next time? I have a program which works, but I want it so that escape ends the program and I can give the other buttons functions as well if pressed. Thanks

[@HDDude1981]

Minecraft! Some constructive feedback. I would keep in mind those who are searching a specific beginning programming concept versus those watching your tutorials from the beginning. Right away, I see at 0:41, up pops a screen of code that doesn't contain the word "FOR" in it, nor does it contain a for loop. It looks like A LOT of code. This is intimidating for beginners. I'd much rather see you start with a blank screen with no code and build the concepts from the basics. What is a For loop? Why should we use it? What is an example of its basic use? What is its intermediate-level use? Finally, how do we use it in a practical situation? Then re-incorporate the stuff from your previous videos in order to build on your concepts. Just a friendly suggestion. Cheers.

[@Avionics2]

hello I started following your lessons. they are very good and very clear for a new commer like me. i was wondering if you take on GUI in C# later? i am very interested to lear GUI in C#.

[@dvlmc]

Brackeys, Do you think you would be able to do reviews of some paid unity assets and give some opinions whether or not they are worth purchasing?

[@Nick-lx4fo]

thanks for tuning in at *brackeys*

[@gitimollikonwar9975]

Congrats brackeys you've got 1m subscribers

[@Vivi_Strike]

I like how you give me a challenge in the last episode to make it guess how far i am from the correct number answer but don't show me anything at all required to make that, like the math.abs and diff. It was impossible challenge...

[@faneyte66]

The way I did it before watching the answer was to include the formula (num01*num02 - answer) in the middle of each wrong response in the switch loop. For instance: Console.WriteLine("Your answer was off by " + (num01*num02 - answer) + ". You better try again! ") Sure you can get negative numbers as a response, but it still let's you know how far off you were from the right answer; so it was indeed possible to make it happen without any new skills :) I know this was 2 years ago but I hope this helps someone learning from Brackeys now like myself!

[@tylerwaters20]

//@@faneyte66 yeah i did pretty much the same thing but stored the number they got it wrong by in a variable int rangeOfFailure = answer - num1 * num2; //then if you want to make the negative numbers positive you can do this if (rangeOfFailure < 0) { rangeOfFailure = -rangeOfFailure; } //then print Console.WriteLine("Unlucky you were wrong by " + rangeOfFailure + " . The answer was " + num1 * num2 ); Console.ReadKey(); // or put it in the switch statement switch (rangeOfFailure) { case 1: Console.WriteLine("Unlucky you were wrong by " + rangeOfFailure + " . The answer was " + num1 * num2 ); break; case 2: Console.WriteLine("that answer was incorrect you were wrong by " + rangeOfFailure + " .The answer was " + num1 * num2); break; default: Console.WriteLine("you can do better than that you were wrong by " + rangeOfFailure + " . The answer was " + num1 * num2); break; }

[@MrSale1990]

Wow, just watched number 5 , and woola , got 6 part :D Thanks man !

[@ziauddin1543]

Can you help with a small problem in my code? The message says "expected" } else { int diff = Math.Abs(answer - (num01 * num02)); if (diff == 1) { Console.WriteLine("You are so close!"); } else if (diff

[@Rarests]

Please copy and paste all your code so I can see whats wrong. The problem doesnt appear to be in that segment

[@denoizewan7999]

Concerning the challenge for the Switch statements, I made mine that has different responses whether the answer to the multiplication problem is right or wrong. I tried idiot-proofing my program. By that I mean what if the user entered a string value rather than an integer value in answering the multiplication question? I thought the "else" part of my IF statement covers it, but my program just encounters an error whenever I put in a string value to answer the multiplication question.

[@blenderremastered9959]

how long have you been programming Brackeys i need motivation.

[@toivomerilainen1970]

This is a great copy & paste excercise, but unfortunately even what you call "basics" is too complicated for me. The program works, but I'm not understanding the magic behind it. I'm not learning *why* this works.

[@AdiHasArrived]

It is alright if you do not understand programming at first. Make sure you know what each word and line of the code does. Keep practising. The magic works because you implemented a code whose task is to make the magic work.

[@pipsqeak7104]

@@AdiHasArrived I gotta keep the chain going. One response every two years! also I dont understand either.

[@AdiHasArrived]

@@pipsqeak7104 hahahha you just gave me nostalgia now that I look back at these days

[@qriosvale3560]

lol, love the intro, just placing minecraft into the "hidden stuff" folder

[@puct9]

Just a little bit more can make a whole video a lot nicer.

[@cloroxbleach1652]

hi

[@HYBRIDLqTHEORY]

7:35 it dont starts at Zero on my windows 7 device with visual studio 2015

[@Rarests]

Answer: for (int i = 1; i < 101; i++) { if (i % 2 == 0) { Console.WriteLine(i); } } Console.ReadKey();

[@alexslavski5056]

Please tell me that in the beginning of the video you were referring to a voxel engine for Unity that you have complete by now!!! :-)

[@عالمانميوالكرتون-ب2ه]

thank you very much for this course it's intersing for me

[@Sachin-ux5zd]

type his on notepad and save it with the a .bat at the end. E.G script.bat @echo off :1 start www.google.com goto :1

[@121Gamerscom]

i was looking forward to lesson 7 are you making more or is this the last episode ???

[@GordKeen]

This has made me understand that i clearly do not like computers enough because this is to hard for me and its just c# the easiest to learn. Time to find a new career.

[@evolveknowledge1303]

Dreage Not really, in terms of programming languages I would say python would be the easiest, then skipping to Javascript which is easier to learn than C# but can still offer most of the functions that C# has

[@magnusm4]

+EvolveKnowledge javascript is baby compared to Java and c#

[@razshneider2375]

what is the different between while and for?

[@angelopezreno2611]

That comercial is insane, great!

[@engineerkian8060]

Thank You... You make great tutorials!

[@sebastianjimenez2184]

This might be an obvious question, but does the program run the code top to bottom, or bottom to top? I know that in processing it runs bottom to top, so I wasn't sure what it would be here.

[@ronaldortiz7173]

string[] array = { "John", "Wayne", "Jake", "Emmett", "James" }; for (int i = 0; i < array.Length; i++) { Console.WriteLine(array[i]); } Console.ReadKey(true);

[@HazemEl-u6w]

Brackeys can you please lower the brightness of your client it is hard to see the letters if your not in full screen BTW thanks for the videos i love it!

[@jkarateking9187]

When's the next video going to be? I hope it's soon as I am enjoying this series :D

[@kenaida22]

How do I create a Switch state for a range of numbers? For example: I want a case for number between 1-50, another case for numbers 51-100, another case for number for 101-150

[@hardwaregawd2902]

i came up with this: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplication3 { class Program { static void Main(string[] args) { Random numbergenerator = new Random(); test: int value1 = numbergenerator.Next(1, 111); int value2 = numbergenerator.Next(1, 111); Console.WriteLine(value1 + " + " + value2 + " is:"); int answ = Convert.ToInt32(Console.ReadLine()); if (answ == value1 + value2) { int responsetrue = numbergenerator.Next(1, 4); switch (responsetrue) { default: Console.WriteLine("Correct!"); break; case 1: Console.WriteLine("Awesome, you did it!"); break; case 2: Console.WriteLine("Congrats, it was correct!"); break; } } else if (answ < value1 + value2) { Console.WriteLine("Bad luck, you were " + (value1 + value2 - answ) + " off."); goto test; } else { int responsefalse = numbergenerator.Next(1, 4); switch (responsefalse) { default: Console.WriteLine("Better luck next time, you were " + (answ - (value1 + value2)) + " off."); goto test; break; case 1: Console.WriteLine("Come on, try again :), you were only " + (answ - (value1 + value2)) + " off"); goto test; break; case 2: Console.WriteLine("You were " + (answ - (value1 + value2)) + " off"); goto test; break; } } } } }

[@Vider7CC]

Hey, could you make a video about interfaces?

[@Cube189]

What's with the warning the console is showing? Also, doesn't Math.Abs require any Math library to be included?

[@horussolis9577]

I got it to finally work bbut it wasn't pretty because I didn't know about math.abs

[@youagain7543]

I think the while just the same as for loop In the for loop you do the incrementation in braces that's it

[@TrueWeebKing]

You again? A while loop is better for using a Boolean

[@XstylePheonyX]

"I have been busy with things" *hides minecraft* :D

[@shockkuuu]

"been busy with some important projects" casually moves minecraft to hidden stuff folder. 0:14

[@The_Trucker_Gamer]

How do you use a for loop if you want it to repeat a message to the users input 3 times? Like using it with numbers is easy but using it for a Console.ReadLine(); 3x I can't figure out. For example; You ask a user to Guess a number between 1 and 10. You only want them to have 3 guesses before the compiler closes. If they guess right say "you win" If they guess wrong say "guess again" I only want it to ask them to guess again twice and after the third guess the cmd closes. Can you make this video?

[@ashwinpande7095]

Challenge:- for (int i = 2; i

[@Kjobbit]

can anyone explain what i++ exactly does? I was under the impression it re-added the value of i to itself when the code looped back if the value of i was under 10 but then when he changed it to zero he lost me, surely that will just result in an infinite string of zeros?

[@rhysmarchant-ludlow8211]

Yay, I was waiting for this one :) Thanks :) :) :)

[@nicksprogress613]

i love how at 3:25 your like i dont need that code just a simple program we didnt really work on lol

[@PercivalQyou]

how come if I type for(int i = 1, i

[@sulfasolate]

+Hernando Chandra put ";" instead of "," for i = 1

[@6y428]

Wow actually C# has a lot in common with Roblox Lua ,in roblox we'd say like "for i, v do (we set i and v to a value) end"

[@ekhliousful]

Math.Abs() to get the absolute doesn't work for me , Any Suggestions/explanation?

[@raisin4406]

Here’s my solution to the challenge: int remainder; for (i = 0; i

[@roran-san]

Good vid bruh, much appreciated

[@juniorbrpr]

I'm not able to run NET framework 4 because i am running a 32bit OS. Is there any way around this?

[@himynameis2739]

The .NET framework runs on both 32 and 64 bit operating systems. You can install it fine from the Microsoft site.

[@6equj589]

for (int i = 0; i

[@darkkidnessgaming7893]

Thx this helped me with learning my exam haha 😂

[@fsaforosaforo6338]

Hi, I having problem with for (int counter=0; counter

[@alexbrony3984]

Can I put for loop inside of the if statement?

[@himynameis2739]

You can put a for loop inside an if statement or an if statement inside a for loop. No problem. Just make sure you have your statement in the right place (within the right set of curly brackets for when you want it to run).

[@TheKarolans]

Expecting a Minecraft mod from you soon! :D

[@COLLAXHD]

THANK U SO MYCH BRACKEYS

[@kubkub7156]

Hey umm . . A bit off topic, but when I press AltGr + X, something like screenshot taker appears (using Windows 8) I dont know how to turn it off :/

[@themeeman]

+Proxy, The Hornet POX *very off topic

[@ThickUP]

Find the power button located somewhere on your computer. It will immediately close the capturing device.

[@DocterKankle]

thank you so much

[@LizzyRBLX]

This looks a lot from what I learned from javascript :P

[@Mask60YT]

i didnt know that the math.abs existed so i had to write a whole bunch of other code to make it so if you went over it would give you how much you went over

[@JustCallMePCra]

do you still make videos? I looked at your fb page and nothing new has been posted

[@boylmao8661]

"Really busy of some important projects" *Drags Minecraft inside the hidden stuff*

[@MachinistakaxERo]

wow did we rellay just watch the same video??

[@AnasMations]

i love programming

[@michaeldellorfano7572]

The else statement from homework 5 doesn't have to be there. The else statement after the case 3 break before the in diff = math.Abs part. A error pops up with that else satement being there and the program wont run... Honestly though thank you for these tutorials I'm learning a lot

[@sergiomarinpetersen6879]

this is so much like javascript for example the for loop in exactly same syntax same as the switch and if else statements. The major difference is that instead of console.log here it is Console.WriteLine and instead of prompt(); here is Console.ReadLine(); Intresting.

[@dequan300]

Public static void main {weather(); Console.Read(); } Public static void weather() {Console.Writeline("what's the weather like out there ? "); String wethttemp = Console.ReadLine(); Int tempnum = int.Parse (wethttemp()) tempnum= (1,21); Switch (5,10) { Case(6) Console.WriteLine ("that's pretty cold"); Break; } } I think that's right I'm not at a computer to check.

[@DeaMikan]

Wonderful!

[@JC-ov8ko]

Keep the cool stuff coming dude! And yes, your voice sounds weird...

[@chasestacy922]

i can write my code but i cant run it it just gives me a build error and says check the build logs. Dont know where those are so it's not helpful. Help?

[@ToskersCorner]

Still need help?

[@pabloalmaguer4311]

Could you give me your wallpaper's download link? Please

[@youagain7543]

Most of c# is Same as CPP As I have learned CPP I find it easy to learn c#

[@areg7182]

lol u were playing minecraft lol. but still u are the best tutor :)

[@whiiboi]

How do you create third person rpg games

[@Octamed]

Nice. But man those { on the previous line bug me! Beginners get super confused by that style I find.