As a second year Computer Science undergrad with plenty of experience coding in other languages, I usually find code tutorials extremely dull, but you point out a lot of the intricacies of C++ and explain things concisely, so these videos have actually been very interesting so far. Thanks very much for making this series!
I haven't even started learning C++ yet, but I'm really enjoying watching these videos. They're still very useful information even for other languages.
I think it's important to understand concepts that C and C++ teach you even if you only program in higher level languages. It's good to know what the higher-level languages are doing for you behind the scenes, so you have an idea of what everything is costing you (in terms of performance, etc). That way you understand the tradeoffs you are making.
The final product of your multiplication program is actually still messy. Cleaner version which does the same thing: #include void MultiplyAndLog(int a, int b) { std::cout
I like how fast you talk. I consume the words by a huge block of many sentences instead of one word by one word. Thanks to this, you managed to shrink 2 hours of lecture on Functions in C++ in less than 10 minutes. You are God sent
for me the secret sauce in these wonderful videos is The Cherno's obvious passion for the subject it comes through loud and clear every time lots of youtubers grind out the vids for the likes and subscribes but this guy not only knows his subject he actually loves it, too
Oh my God! Thank you, dude! You rock! I was struggling with even the most basic functions. I'm so brand spanking new to C++, I didn't even know how to label what I was struggling with or ask the right questions to get help from my instructor or my peers or my tutor or anyone. But you made it crystal clear! I wrote a tiny program from scratch just to practice what you taught, and it ran and behaved as I intended, thanks to you! Aaaaand... it turns out that was the only place where I was stuck (so far) so I was able to get the program assigned to me up and running as intended, too. Thank you!
God, I feel like I finally understand a tutorial, I never understand tutorials I don't know why I even try to start those 9-hour 22-hour 30-hour masters courses on programming. This is digestible, this is the most comprehensive c++ tutorial I've ever watched because I actually took home some information.
I love the direction this c++ tutorial is going! You were a huge inspiration for me to start programming java games on my channel, and I am excited to see where this new series goes!
5:10 hope this source code helps if you've had any problem understanding #include using namespace std; void mullog(); int mul(int x,int y){ return x*y; } int log(int a,int b){ cout
I think that modern compilers won't really care if a function is inline or not, they rather use algorithms to make assumptions to decide whether to make them inline or not. Correct me if I am wrong, please do continue this... I will surely contribute as soon as I get a job - you are making my days great with c++. Learned a lot from you; really really inspirational and knowledgeable.
7:08, Another, more subtle, benefit to using functions is to visually, and semantically, separate logic into discrete chunks. This makes it muuuch easier to quickly parse out what a function is doing, if the individual parts of the parent functions are themselves functions. It also forces the programmer to indicate (via function signatures) which code uses which variables. This makes for more maintainable code, since it becomes much clearer where a variable is used, and what changing it will impact. General rule of thumb, is to keep functions no longer than one screen tall. Of course, it's a hard rule to stick to (especially when declaring a bunch of inline data), but it's a really good indicator that a function is getting too long.
Ok first of all, I really did paused the video and went to instagram to actually follow you. That edit to pause the background music when you said that really brought my attention btw lol. Now onto Summary Functions are blocks of code that perform a specific task. We can remember a function by its input and output. To define a function, we have to declare whether it has a return value. If it doesnt, declare using 'void', and if it does, declare using the appropriate data type according to the result. We also have to declare the data type of inputs. There are a whole lot of benefits when it comes to using functions in an appropriate manner. 1. IT lets the code DRY, and easy to read and understand 2. It is easy to update and maintain if there are any problem that occurs. However, we shouldn't be overusing functions, since, above the appropriate level, our code could be messy and difficult to read. Deciding what is actually worth putting in functions would require us to have some decent experience with programming, but as a rough rule of thumb, just make a function whenever you find there are some lines of code that are being repeated over and over again. Going into the details of why is like this. If a function is being used not in-line(as Cherno stresses), it would result as in the compiler or CPU(what ever) jumping to the location of our binary code where the function is defined, to look for the definition, and jumping back to the place where function was executed. Calling a function also results in creating a whole stack framework with parameters and return address. This is also a waste of memory and time.(if I understood correctly.)
That bit about making mistakes from copy and pasting: my professor, when he was teaching us C, kept telling us that "code duplication is EVIL." He kept saying that, and it's the one thing that really stuck because he kept saying it lol
In embedded systems, using functions will also actually make you use less memory. Which is crucial, since you need to manage resources more importantly than with computer science.
Lol dude, I think am only gonna watch your videos from now. Am a beginner in cpp, but you explain everything so well plus you are funny dude! you def get a follow
several years ago when I picked up programming due to school, not a focal point for my apprenticeship at the time... I never fully understood functions. With this video, I think i grasped the concept a lot better. TY :)
@Cherno i love your videos. At first when i started watching them without going for the beginning ones.....It looked tough to me. But now looking back at the beginning videos it all makes sense. YOU'RE AMAZING !!! 😍🥰
I just want to say thank you for all that you have already done for us and keep doing. The Chearno, for me you are the best tutor ever. And again, thank you!
This series is awesome, i am looking for this type of series.Thank you so much Cherno. Can you please make videos on Concurrency in C++ and also on Design Patterns
I usually go by a self-made rule I call the rule of 3. If I have to write a chunk of code that's more than 3 lines long and I have to write the same chunk of code more than 3 times in my codebase, then I'm making a function.
It's missing alot information about functions. For example passing by reference or value. Passing in functions... and much more. It's just scratching the VERY VERY basics of functions. But good for beginners. But don't expect to understand everything about functions after this video lol.
Something that almost tripped me off was whether it was necessary to declare a function when compiling a single .cpp file.. after all I had learned in the past that this is the case. Turns out it IS necessary, but the function definition acts as its own declaration as long as it is placed before the entry point (main), which he always does in this video. This had confused me in the video about Header files that comes after. You also don't always have to include the file that contains the definition because of how the linker works. I love these videos. I learned C++ from Mike Dawson's Beginning C++ through Game programming (great book btw, check it out if you're totally new!), but I am watching this to fill some gaps :) Thanks Cherno!
I created a function with a pointer because of this video! This is really good stuff for learning foundational things, especially when self taught. Thank you! +1
Mr Cherno, first of all I will like to thank you for all the wonderful things you have done for me personally in terms of teaching. Your videos have been beyond what i call helpful, I will like to ask you for some specifications regarding the hardware. For some of the previous series you have done. Series like sparky and building the java game engine. What kind of hardware will you recommend in order to achieve maximum performance while building the game engine
I just watch that video stoned, man u are so fucking good teaching. And you have a high level of programming skills. I've never had a idol of programming world, but now i have you as my idol!
Nice intro to functions! although perhaps a bit too basic. I'm looking forward to more advanced topics like the rule of three, modularizing code with unions and templates etc although I suppose those topics have more to do with classes .
you make your videos in such a didactic and incredible way that the only thing that makes my learning difficult is the way that your beauty distracts me (and it distracts a lot rs) Thanks for the content!
Would expand on this topic with my experience in Web development, nevertheless, it is writing code daily :). The another important thing apart from readable code and not making spaghetti, therefore applying the solution to split your code into nice functions, is able to write tests for the code. So code which is split into nice little short functions is easier to write tests for, if any needed in given context. It is all about delegation and then writing isolated tests to test your application.
Raising my devops hand here just say: please return useful and sane values from your main (and document them!)! Testing the return value of programs is the fundamental error checking method from within shell scripting or even exec within other programs. By all means create an error handling function or class to organise this.
You are a god, I really appreciate all of those tutorials and I love your videos! Keep up the good work and if you can make a series on dll coding, i mean like conecting to the pipe and more stuff
Your series is 99.99% perfect. I reserve 0.01% for the opening curly brace on a new line and using an uppercase character for the first letter of a function name. Ahhhh...C#, what have you done to style...? :D
I am sure he knows. But for others. The compiler will see that all those multiplications result in constants and simply convert them to constants. Yeah, it's that smart.
I think you should never copy and paste code. It's always better to type it out, test it and then move on knowing it works as you intended. This eliminates situations where you get all kind of errors down the line, and not remember or think of something you changed maybe 4 hours, 2 days or 1 week ago!
if it were that simple. This is because a function can take over not only basic data types but also complex ones as well as methods and other functions, either by value or by reference, there is simply much more to it. But I forgot to mention that a function can have another function as a return value
I think all computer science classes should have music playing in the background instead of stale silence with the sound of keys clacking like its an internet sweatshop
In a lot of my programs I tend to create single use functions for things that the program does to set up an environment for the main task of the program. For example the thing im working on right now needs to take a few text files as input. I feel like this makes my code much easier to understand since I can keep only the important bits in the main function. Do you think this is a nad practice? How about single use functions for other large tasks? Imo that could also make things easier to understand.
As a second year Computer Science undergrad with plenty of experience coding in other languages, I usually find code tutorials extremely dull, but you point out a lot of the intricacies of C++ and explain things concisely, so these videos have actually been very interesting so far. Thanks very much for making this series!
same, those 4 hour long videos just become shifting to new syntax
This is full-time youtuber tutorial quality. Thanks so much for this series and sticking with it
I'm from the future and he is a full time youtuber now, you were right
I am also from the future and I can confirm he is still to this day a full time CZcamsr
I'm also from the future, he's still going for the grind
I am also from the future and he’s still going strong.
i'm fast approaching my 64th birthday
it's like having my grandson teach me c++
wonderful stuff
many thanks for sharing your knowledge
I'm a CS student and so far everything we do is in Java. I've always wanted to get into c++ and then wham! Cherno comes in clutch. Thx for doing this
C++ isn't all that fun, it's necessary for some companies and platforms and is otherwise inconvenient.
Java is the way to go honestly.
@@ashishkalam9337 i think he already graduated bro
And? How's it going now? Did you learn c++, did you find a job?
same! I do like how convenient Java is though, so whenever performance isn't a requirement I'll probably just use Java...
@@ashishkalam9337 it all depends, it may not be fun to you but for someone else it is
This is the only CZcamsr that actually breaks these concepts down. 10/10 best series
And again, the quality of this video is truly stunning.
What?! A midway video? Am I dreaming? Has Cherno gone crazy?!
Cournaut Midweek*
Resantic
Hey Geoff, when you gonna make the drop?
Cournaut idk but for sure: im going crazy 2 vids in the week!!!!!!
anthony-y what
Resantic
Don't do this to me man. We can't discuss the details here. The er... drop. When you dropping that stuff off that I asked for?
I haven't even started learning C++ yet, but I'm really enjoying watching these videos. They're still very useful information even for other languages.
I think it's important to understand concepts that C and C++ teach you even if you only program in higher level languages.
It's good to know what the higher-level languages are doing for you behind the scenes, so you have an idea of what everything is costing you (in terms of performance, etc). That way you understand the tradeoffs you are making.
The final product of your multiplication program is actually still messy.
Cleaner version which does the same thing:
#include
void MultiplyAndLog(int a, int b)
{
std::cout
I like how fast you talk. I consume the words by a huge block of many sentences instead of one word by one word. Thanks to this, you managed to shrink 2 hours of lecture on Functions in C++ in less than 10 minutes. You are God sent
for me the secret sauce in these wonderful videos is The Cherno's obvious passion for the subject
it comes through loud and clear every time
lots of youtubers grind out the vids for the likes and subscribes but this guy not only knows his subject he actually loves it, too
The only problem with this series is that the videos dont come that often, so this was a pleasent supprise :D
Oh my God! Thank you, dude! You rock! I was struggling with even the most basic functions. I'm so brand spanking new to C++, I didn't even know how to label what I was struggling with or ask the right questions to get help from my instructor or my peers or my tutor or anyone. But you made it crystal clear! I wrote a tiny program from scratch just to practice what you taught, and it ran and behaved as I intended, thanks to you! Aaaaand... it turns out that was the only place where I was stuck (so far) so I was able to get the program assigned to me up and running as intended, too. Thank you!
ikr Cherno explains stuff so well :D
God, I feel like I finally understand a tutorial, I never understand tutorials I don't know why I even try to start those 9-hour 22-hour 30-hour masters courses on programming. This is digestible, this is the most comprehensive c++ tutorial I've ever watched because I actually took home some information.
you sir have earned yourself a sub. The quality of these tutorials is truly amazing. You describe things in exactly the style I like.
how r u doinn
I love the direction this c++ tutorial is going! You were a huge inspiration for me to start programming java games on my channel, and I am excited to see where this new series goes!
5:10
hope this source code helps if you've had any problem understanding
#include
using namespace std;
void mullog();
int mul(int x,int y){
return x*y;
}
int log(int a,int b){
cout
I think that modern compilers won't really care if a function is inline or not, they rather use algorithms to make assumptions to decide whether to make them inline or not. Correct me if I am wrong, please do continue this... I will surely contribute as soon as I get a job - you are making my days great with c++. Learned a lot from you; really really inspirational and knowledgeable.
bro inline makes the code readable nothing more in that
@@aryansharma4340what?!
7:08, Another, more subtle, benefit to using functions is to visually, and semantically, separate logic into discrete chunks. This makes it muuuch easier to quickly parse out what a function is doing, if the individual parts of the parent functions are themselves functions. It also forces the programmer to indicate (via function signatures) which code uses which variables. This makes for more maintainable code, since it becomes much clearer where a variable is used, and what changing it will impact.
General rule of thumb, is to keep functions no longer than one screen tall. Of course, it's a hard rule to stick to (especially when declaring a bunch of inline data), but it's a really good indicator that a function is getting too long.
Ok first of all, I really did paused the video and went to instagram to actually follow you.
That edit to pause the background music when you said that really brought my attention btw lol.
Now onto Summary
Functions are blocks of code that perform a specific task. We can remember a function by its input and output.
To define a function, we have to declare whether it has a return value. If it doesnt, declare using 'void', and if it does, declare using the appropriate data type according to the result. We also have to declare the data type of inputs.
There are a whole lot of benefits when it comes to using functions in an appropriate manner.
1. IT lets the code DRY, and easy to read and understand
2. It is easy to update and maintain if there are any problem that occurs.
However, we shouldn't be overusing functions, since, above the appropriate level, our code could be messy and difficult to read. Deciding what is actually worth putting in functions would require us to have some decent experience with programming, but as a rough rule of thumb, just make a function whenever you find there are some lines of code that are being repeated over and over again.
Going into the details of why is like this. If a function is being used not in-line(as Cherno stresses), it would result as in the compiler or CPU(what ever) jumping to the location of our binary code where the function is defined, to look for the definition, and jumping back to the place where function was executed. Calling a function also results in creating a whole stack framework with parameters and return address. This is also a waste of memory and time.(if I understood correctly.)
This is the best programming series ever! :D
That bit about making mistakes from copy and pasting: my professor, when he was teaching us C, kept telling us that "code duplication is EVIL." He kept saying that, and it's the one thing that really stuck because he kept saying it lol
It's facts tho
In embedded systems, using functions will also actually make you use less memory. Which is crucial, since you need to manage resources more importantly than with computer science.
I never even heard anything about unsigned variables once in my C++ 1 class. These videos are amazing.
Lol dude, I think am only gonna watch your videos from now. Am a beginner in cpp, but you explain everything so well plus you are funny dude! you def get a follow
Great series Cherno! really lovely.
several years ago when I picked up programming due to school, not a focal point for my apprenticeship at the time... I never fully understood functions.
With this video, I think i grasped the concept a lot better.
TY :)
This is best C++ course I’ve found on CZcams.
my lecturer explained it nearly about 1 hour but still we cant understand....thank god i found this channel!!!Thank you!
same
@Cherno i love your videos. At first when i started watching them without going for the beginning ones.....It looked tough to me. But now looking back at the beginning videos it all makes sense. YOU'RE AMAZING !!! 😍🥰
Thank you for these videos man. I can't explain with words alone how much these videos have helped me to refine my C++ skill set.
Any multi-line snippet you end up repeating in several places is probably better to write a function for imo.
After watching 10s of videos this small video actually gave me a clear idea about functions
At school our teacher makes us to make every code with a function, even simple ones like: Fibbonacci series and the the least common multiple
The production quality on these videos has really gone through the roof
omg thank you I just been having trouble lately understanding Functions
U're amazing and your videos are getting even better. Congrats.
I just want to say thank you for all that you have already done for us and keep doing. The Chearno, for me you are the best tutor ever. And again, thank you!
It is the best C++ tutorial in all tutorials i have learned! Love you, the Cherno!
I really hope that this C++ series gets as many audiences as possible !! The best C++ series available on CZcams :)
This series is awesome, i am looking for this type of series.Thank you so much Cherno.
Can you please make videos on Concurrency in C++ and also on Design Patterns
this is the best c++ tutorial serie ever! This explains every bit of c++.
I usually go by a self-made rule I call the rule of 3. If I have to write a chunk of code that's more than 3 lines long and I have to write the same chunk of code more than 3 times in my codebase, then I'm making a function.
Glad to have found this channel and commence my c++ journey.
bong hits between vids bro, imma be a genius by the end .
I won't be surprised if your videos show in college to teach students c++ (sorry for my bad English tho )
The stuff on the compiler/linker is pretty good for interview studying imo
My computer science teacher is assigning us to watch this video and come up with two questions about C++ Functions
No prob ^, (sorry for my bad English)
It's missing alot information about functions. For example passing by reference or value. Passing in functions... and much more. It's just scratching the VERY VERY basics of functions. But good for beginners. But don't expect to understand everything about functions after this video lol.
Herman Willems No shit, this is obviously a beginner video.
Something that almost tripped me off was whether it was necessary to declare a function when compiling a single .cpp file.. after all I had learned in the past that this is the case. Turns out it IS necessary, but the function definition acts as its own declaration as long as it is placed before the entry point (main), which he always does in this video. This had confused me in the video about Header files that comes after. You also don't always have to include the file that contains the definition because of how the linker works.
I love these videos. I learned C++ from Mike Dawson's Beginning C++ through Game programming (great book btw, check it out if you're totally new!), but I am watching this to fill some gaps :) Thanks Cherno!
He's really come a long way...I started here
congratulations on your wedding
Thanks for existing Cherno....
I like that you have increased the font size so that we can watch on low res or small screens.
4yr of college & my teacher could never explain things this easy
I created a function with a pointer because of this video! This is really good stuff for learning foundational things, especially when self taught. Thank you! +1
Mr Cherno, first of all I will like to thank you for all the wonderful things you have done for me personally in terms of teaching. Your videos have been beyond what i call helpful, I will like to ask you for some specifications regarding the hardware. For some of the previous series you have done. Series like sparky and building the java game engine. What kind of hardware will you recommend in order to achieve maximum performance while building the game engine
I just watch that video stoned, man u are so fucking good teaching. And you have a high level of programming skills.
I've never had a idol of programming world, but now i have you as my idol!
Thanks for the series! Great refresher since I haven't had to write C++ in a couple years.
This guy explains like 5 head strat's but my brain cant keep up or understand. i just hope one day i can wrap my brain around it
Nice intro to functions! although perhaps a bit too basic. I'm looking forward to more advanced topics like the rule of three, modularizing code with unions and templates etc although I suppose those topics have more to do with classes .
you make your videos in such a didactic and incredible way that the only thing that makes my learning difficult is the way that your beauty distracts me (and it distracts a lot rs)
Thanks for the content!
Thanks Cherno
Love it dude. Can't wait to finish the C++ series so I can dive into the Game Engine playlist.
I want to specify that functions has other various features. They also make interface, self-descripted code, possibility of modular code.
your videos are amazing. so many details and answers to common questions!
Thanks for this C++ tutorial!
Would expand on this topic with my experience in Web development, nevertheless, it is writing code daily :). The another important thing apart from readable code and not making spaghetti, therefore applying the solution to split your code into nice functions, is able to write tests for the code. So code which is split into nice little short functions is easier to write tests for, if any needed in given context. It is all about delegation and then writing isolated tests to test your application.
Hey sir your series is amazing your teaching is looks like you have very heavy duty expereince.
Love these series
Thanks for this! Super helpful with school!
Raising my devops hand here just say: please return useful and sane values from your main (and document them!)! Testing the return value of programs is the fundamental error checking method from within shell scripting or even exec within other programs. By all means create an error handling function or class to organise this.
This series is magnificent.
Your way of teaching is too much good..... i really like and enjoy it.....
This was so helpful! Thank you for your effort
Hi Cherno, I would like to say thank you. You have excellent training skill, and thank god, you give this course free :). Hope you fine.
Love the videos, thank you. One suggestion; Could you zoom out a bit in the future when writing the code, would help when following along.
your videos are perfect at 75 speed, you are wise and fast !
You are a god, I really appreciate all of those tutorials and I love your videos! Keep up the good work and if you can make a series on dll coding, i mean like conecting to the pipe and more stuff
Thank you!! Wasn't expecting a video in the middle of the week..
6 years later from this video i followed you on instagram :D
Me: "Has the Cherno gone crazy?"
The Cherno: "Maybe but that's not the point"
AHhahahahaah
Your series is 99.99% perfect. I reserve 0.01% for the opening curly brace on a new line and using an uppercase character for the first letter of a function name. Ahhhh...C#, what have you done to style...? :D
Forgetting to change a variable name after copying costs me half an hour EVERY. SINGLE. TIME.
I am sure he knows.
But for others.
The compiler will see that all those multiplications result in constants and simply convert them to constants.
Yeah, it's that smart.
I think you should never copy and paste code. It's always better to type it out, test it and then move on knowing it works as you intended.
This eliminates situations where you get all kind of errors down the line, and not remember or think of something you changed maybe 4 hours, 2 days or 1 week ago!
the part about copying and pasting is funny to watch after seeing your vulkan video about memory used by CPU only
An episode half-way through the week? I'm pausing Masterchef for this!
not sure if i am more jealous of your hair or your c++ skill
Why cant it be both?😂
Loved the explaination! Can you please make another video about inline functions and how they impact on performance?
its the best video series,ever!
brilliant explanation thank you so much
these videos are a beast bro jackson
if it were that simple. This is because a function can take over not only basic data types but also complex ones as well as methods and other functions, either by value or by reference, there is simply much more to it.
But I forgot to mention that a function can have another function as a return value
Thanks for an awesome second video of the week!!!
Same question. Am I dreaming ? I haven't done my homework. But thank you very much
Really appreciate the videos, Cherno. Looking forward to each one.
I think all computer science classes should have music playing in the background instead of stale silence with the sound of keys clacking like its an internet sweatshop
If you hear carefully, there are both in this video and honestly, it's kinda enjoying to hear keys clacking :)
In a lot of my programs I tend to create single use functions for things that the program does to set up an environment for the main task of the program. For example the thing im working on right now needs to take a few text files as input. I feel like this makes my code much easier to understand since I can keep only the important bits in the main function. Do you think this is a nad practice? How about single use functions for other large tasks? Imo that could also make things easier to understand.
thank you, sir. you explain everything greatly
Thanks cherno
Niceeeeee to see a new video in the week!!
Damn dude... You have a talent for helping people understand... SUBBED!
Thank you so much! Your videos are amazing!