## 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 |

Related Programs