# 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 // 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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