# C Program to check whether the number is even or odd.

Last updated on July 27, 2020

## What are Even or Odd numbers: #

**Even Number**: A number which is evenly divisible (i.e leaves no remainder) by `2`

is called an even number.

**Odd Number**: A number which is not evenly divisible by `2`

is called an odd number.

The following is a C program to check whether a number is even or odd.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | ```
/*************************************************************
* Program to check whether the entered number is even or odd.
**************************************************************/
#include<stdio.h> // include stdio.h
int main()
{
int n;
printf("Enter a number: ");
scanf("%d", &n);
if(n % 2 == 0)
{
printf("%d is even", n);
}
else
{
printf("%d is odd", n);
}
return 0;
}
``` |

**Expected Output:** 1st run:

1 2 | ```
Enter a number: 18
18 is even
``` |

2nd run:

1 2 | ```
Enter a number: 5555
5555 is odd
``` |

## How it works #

A number is even if it is evenly divisible by 2. To check for even number we simply use remainder operator `%`

. If the number is even then remainder operator will return `0`

, otherwise, a non-zero value. For example:

1 2 | ```
4 % 2 = 0 => 4 is even
11 % 2 = 1 => 11 is odd
``` |

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