Original subtitles

So in this video, we are going to see water comments and how we can use them in a C programming language.

So here we have our previous exercise where we printed Alphatech, the screen.

Let's say that it's the same as the program where we printed the full name, the first name and the

last name.

Let's say that it's pretty much the same.

Alphatech is the first name and the last name.

Now we can simply add a comment that specifies in just one sentence what this program does.

For example, adding a comment like this program brings out our first and last name.

And if we would try to run this code, then we can see that it won't work.

We'll just get some errors.

And the reason for that is very simple.

We didn't specify there.

This particular line where we say that these program prints out first name and last name, that this

line is a comment.

We didn't specify that if we'll live it this way, then our computer will think of this line as some

sort of command.

We're expecting it to execute.

And that's not what we want.

All we want is to specify that this particular line is just the comment, just some sort of a note for

us and not a strict command of the computer.

So how can we do it if we would like to comment a single line in C programming language?

Then we'll just use a double slash common prefix.

All right.

Something like that.

This will indicate that these given line is not a command, but rather just common for us as the developers

and guys please know that these comments section, these comments thing is basically used in all of

the programming languages.

They adsit just sort of a concept for developing.

You may also use that in other programming languages that you may encounter in your future, such as

Python, C++, Java and any other programming language.

The only difference will be just in the way you specify the comment for each language.

So, for example, here we use the double slash prefix to specifying the comment in C language and in

other languages.

You may use a double slash while in Python you may use hash, character and so on.

All right.

So we've seen how comments are used to comment out.

Just single lines, buddy, for a comment happens to be more than just one line, which is definitely

something that can happen than we would like to use something else.

Right.

And in such a case, we would like to use a slash asterisk to start a common block, which may consist

of more than just one line of comments.

And and these common blog, by using an associated asterisk slash that will indicate there.

This is it for our common block.

So as you can see here, you may insert a lot of comment lines as part of that common block, for example,

specifying some status or whatsoever.

In this example, we specify what the program does, that it's Prince.

The full name and kind of calculate some average grade of a student.

And then we also print they add the functionalities done and maybe some status above the date and some

other information about what should be done in the future and so on.

So basically, everything that may be necessary for us or for other a developer that will S.R.O. called

in the future.

So anything that was written after this slash asterisk and before the asterisk slash should be considered

as a comment.

So think about what you want to specify in your comments during different parts of your program.

And make sure you use comments wisely, because they may save a lot of time and a lot of effort for

you in the future.

Thank you guys for watching this video.

And I'll see you in the next one by.