C program to check even or odd number using switch case

Write a C program to enter any number and check whether the number is even or odd using switch case. How to check even or odd using switch case in C programming. Logic to check whether a number is even or odd using switch case in C program.

Input number: 12

Even number

Required knowledge

Basic C programming, Switch case

Logic to check even or odd number using switch case

To get the logic of this program, you must know the concept of checking divisibility in C. If not learn it first.

• Program to check divisibility.

Below is the step by step descriptive logic to check even or odd using switch case.

1. Read a number from user, store it in some variable say num.
2. Switch the even number checking expression. Which is switch (num % 2). The expression num % 2 will return either 0 or 1. 0 means num%2 => 0, it is even. 1 means num%2 => 1, the number is odd.
3. For case 0, print even number.
4. For case 1, print odd number.

Program to check even or odd using switch case

/**
 * C program to check Even or Odd number using switch case
 */

#include <stdio.h>

int main()
{
    int num;

    /*
     * Read a number from user
     */
    printf("Enter any number to check even or odd: ");
    scanf("%d", &num);

    switch(num % 2)
    {
        //If n%2 == 0
        case 0: printf("Number is Even");
                break;

        //Else if n%2 == 1
        case 1: printf("Number is Odd");
                break;
    }

    return 0;
} 

Learn other methods to code this program.

• Program to check even odd using if else.
• Program to check even odd using conditional operator.
• Program to check even odd using functions.

Enter any number to check even or odd: 6
Number is Even

Happy coding ;)