Comments

 

Comments are used by the programmer to make the code understandable so that is can be improvised later and to make it more readable. It can also be used to prevent execution when testing alternative code.

 

There are two ways to write Comments: singled-lined or multi-lined.

 

Single line comments

 

Single-line comments are initiated with two forward slashes (//). This comments the entire line after the two slashes.

 

Example:

 

#include <iostream>
using namespace std;

int main() {

  // This is a comment and won't be executed

  cout << "Demo Code";

  return 0;

}

 

Output:

 

Demo Code

 

 

Multi Line comments

 

Multi-line comments start with /* and ends with */

 

The text in between both of these will not be executed by the compiler. Hence comments can we written in multiple lines

 

Example:

 

#include <iostream>
using namespace std;

int main() {

  /*This is a multiple line comment 

  it will not be executed */ 

  cout << "Demo Code";

  return 0;
}

 

Output:

 

Demo Code