C Program to Check Number is Even or Odd

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Check Number Even or Odd
(Last Updated On: September 1, 2018)

In this Program, you’ll learn how to Check Number Even or Odd entered by the User in C Programming.

To Understand this Program to Check Number Even or Odd you should know C Programming and following topics:

  • Arithmetic Operators
  • if…else Statement

A number is even if it is Exactly divided by 2. For Eg: 2, 4, 16, -12, etc.

A number is odd if it is Not Exactly divided by 2. For Eg: 3, 7, 9, -13, etc.

Program to check Entered Number is Even or Odd

#include <stdio.h>
int main()
{
    int A;

    printf("Enter a Number: ");
    scanf("%d", &A);

    // True only if the number is perfectly divisible by 2
    if(A % 2 == 0)
        printf("%d is even.", A);
    else
        printf("%d is odd.", A);

    return 0;
}

Output

Enter a Number: -9
-9 is odd.

In the above Program Number entered by the User is Stored in Variable A.

If the number is perfectly divisible by 2 or not is checked using modulus operator.

If the number is perfectly divisible by 2, then the test expression A%2 == 0 evaluates to 1 (true) and the number is even.

However, if the test expression evaluates to 0 (false), the number is odd.

Program to check Entered Number is Even or Odd using Conditional Operator.

#include <stdio.h>
int main()
{
    int A;

    printf("Enter a Number: ");
    scanf("%d", &A);

    (A % 2 == 0) ? printf("%d is even.", A) : printf("%d is odd.", A);

    return 0;
}

Output

Enter a Number: 6
6 is even.

Ask your questions about Program to Check Number Even or Odd and clarify your/others doubts. Documentation.