Comments in C++

Program comments are explanatory statements that you can include in the C++ code that you write and helps anyone reading it's source code. 

All programming languages allow for some form of comments.

C++ supports single-line and multi-line comments. All characters available inside any comment are ignored by C++ compiler.

A comment can also start with //, extending to the end of the line. For example:

#include <iostream>
using namespace std;

main()
{
   cout << "Hello World"; // prints Hello World

   return 0;
}

When the above code is compiled, it will ignore // prints Hello World and final executable will produce the following result:

Hello World