Comments in C++

TL ; DR:

• Comments are lines of code that C++ will intentionally ignore (not execute). They don't do anything.

  
  

• You add a single line comment in C++ by typing // followed by any text:

  // This is a comment!
  cout << "This is not!" << endl;
  

Full lesson:

Comments are lines of code that C++ will intentionally ignore. They don't do anything.

They're just used to create notes for yourself and others about what the code does.

There are two types of code comments in C++:

1. Single line comments:

We create single line comments by typing // and C++ will ignore (not execute) any text between // and the end of the line.

Single line comments automatically end at the next line of code:

// Next line will greet the user:
cout << "Hello user!";

Output of this code:

Hello user!

We can also use single line comments at the end of a line to explain the code:

cout << "Hello user!" << endl; // This line greets the user
cout << "This is not a comment!";

Output of this code:

Hello user!
This is not a comment!

2. Multi-line comments

We can also comment multiple lines of code using multi-line comments.

We type /* to begin the comment and type */ to end the comment:

/* This is a 
multi-line comment
cout << "This will not run";
Next line will greet the user:
*/

cout << "Hello user!";

Output of this code:

Hello user!

Assignment
Follow the Coding Tutorial and let's write some comments!

Hint
Look at the examples above if you get stuck.