Comments in C Language

A well-documention of program makes it more readable and error finding become easier. Comments in C language are used to provide information about lines of code. Comments are totally ignored by compilers. The Compiler does not generate executable code for these comments.

Comments in the C language can be classified into the following three types:
  • Single line comment (// Comments)
  • Multiline comment (/* Comments */)
  • Document Comment (/** Comments */)

1. Single line Comment (// _ _ _ ) - Most of the time single-line comments are used at the end of the line or before the line. The Compiler ignores everything from // to the end of the line.

#include<stdio.h>
void main()
{
   printf("Hello World!\n");  // display "Hello World!"
}

#include<stdio.h>
void main()
{
   printf("Hello World!\n");
   /* This is a multiline comment.
      These line will be ignored by compilers.*/
}

//Addition of two number
/**
  * This Program Multiply two numbers.
  * author: Mr. Gourav
  * company: Know Program
  */
#include<stdio.h>
void main()
{
  int a = 8, b = 15, c;
  c = a*b;
  printf("Multiplication = %d\n", c);
}