Hello, and welcome to the 73rd tutorial on the c++ programming series. And in this poll, when we're looking at commenting, commenting allows you to annotate code without the annotations actually being run when the application is executed. Because they are not compiled comments can also be used to well combinate code which prevents that piece of code from being compiled, very similar to what I've been doing during this series is something that I have done. And I haven't explained it too much, because I knew that there was going to be a tutorial on it and locks it allows you to just sort of eliminate code from being executed. It's a great way of sort of disable the code temporarily and then rename it in it they try and so it's great for testing as well. Because if you only have one icon is a really simple identity to me them too much of an issue and putting it back in the manual if you have an algorithm and that algorithm you created yourself.

But the thing is that can loins if you have that if you do if you have quite a few algorithms, quite a few functions on whatnot throughout the code, and you just want to test it or look what it feels like and runs like with a piece of code without the pieces of code, deleting it, and then putting it back in can not only be time consuming, you can also forget what what was exactly there where it was, or even if it was there in the first place, and you'll be hard to get back to where you want in the same state. Hence, while commenting is useful, so let's just show you how to implement columns. This system of content is applicable to a lot of programming languages. There are two forms of commentary, there is one which is essentially demonstrated here to the single line comment, basically meaning if I put two forward slashes and put something after this single line, comment, and if I were to just click and turn this toggle function After that, run it it only comments that line which is fair enough because it's a single line comment in the something called a multiple line comment and distort the ad for slash asterik.

And then to end it you do asterisk forward slash so anything in between here is commented out. So low is is a T comment yay and everyone This will succeed we've got this single uncomment we've got this multi line comment and oxidation common tech code of law so what we'll do is as T STDs normal conduct for good you enter or equals zero or invest for i plus plus under STD C, out on Never one there's the 0123 and four. Imagine if we finish recording some errors, or we just want to compensate for or the reason we could do this for slash four slash four slash four slash four slash four slash right, and come to the end completely, but it wasn't too bad for for line, man, if this was 29, this could be this can be quite a ridiculous task of continuity line by line.

If you just wanted to comment on this line, then that's great. The two four slash the single line current, but and we run out of that fine. Sorry about that does some sort of notice, notification. And if we want you to comment, or for design, what we could do is for slash asteroid, and then in the common by doing asteroid for slash, everyone is counted that this but we've just done it a lot simpler than competent every single month. That's it for this part of the series. In the next tutorial, we'll be looking at Class headers and implementations.

If you're any questions feel free to message us at support at Sona systems coda UK email will be in the description you can comment on this video or just directly message us via YouTube or the require link for source code will also be in the description. And as usual, thanks for watching and I hope you have a great day.