Comments can be singled-lined or multi-lined.

Single Line Comments

• Single-line comments are preceded by two forward slashes (/).
• Any information after the slashes / on the same line will be disregarded (not performed) because it is unparsable.

A single-line comment is used in this example.

#include <iostream>
 
int main()
{
    // This is a single line comment
    std::cout << "Hello World";
    return 0;
}

Multi-line comments

• A multi-line comment begins with /* and terminates with */.
• The compiler will discard any information between /* and */.

A multi-line comment is used in this example.

#include <iostream>
 
int main()
{
    /* This is a
    multi-line
    comment */
 
    std::cout << "Hello World";
    return 0;
}

The post Comments in C++ first appeared on Student Projects.

1. Block comment: A block comment is used when the comment will span several lines.
Example:

 /*This is a block comment
                    that covers two lines*/

2. Line comment: The line comment uses two slashes (//).Programmers generally use this format for short comments.
Example:

//This is a single line comment

Example program:

/*This is a Greeting program, which prints ‘Hello world’. 
This program demonstrates some of the components of a simple c program*/ 
#include “stdio.h”
#include “conio.h”
void main()
{
printf(“Hello World”);  //This statement prints Hello World
getch();
}//main()

The post Comments in C language first appeared on Student Projects.