Write a Program to Check Even or Odd Numbers in C Using Function

In this tutorial, we are going to see how to write a program to check even or odd numbers in C language using function. Considering we have an integer and we need to check if it is even or odd using a C program.

There are four ways to check even or odd numbers in C, by using for loop, while loop, if-else, or by creating a function.

An even number is an integer exactly divisible by 2. Example: 0, 4, 8, etc.

An odd number is an integer that is not exactly divisible by 2. Example: 1, 3, 7, 15, etc.

To check if the given number is even or odd, we check the remainder of the division by dividing the number by 2.
 

 

Write a Program to Check Even or Odd Numbers in C Using Function

#include <stdio.h>
 
// function to check even or odd numbers
int isEven(int n){
	if(n%2==0){
		printf("\n%d is an even number",n);
	}
	else{
		printf("\n%d is an odd number",n);
	}
}

int main()
{
    int n;
    printf("Enter a number: ");
    scanf("%d",&n);
    isEven(n); //calling the function
    return 0;
}

Output:

Enter a number: 2

2 is an even number

 

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