C Program To Check Leap Year

In this post, we will check whether a year is a leap year or not using C Programming language.

A Leap Year contains 366 days in a year. A year is a leap year if it is exactly divisible by 4 except for century years. The century years are leap years only if they are perfectly divisible by 400 .

So, without further ado, let’s begin the tutorial to check for a leap year.

C Program To Check Leap Year

// C Program To Check Leap Year
#include <stdio.h>
int main(){
    int year;
    
    // Asking for Input
    printf("Enter the Year: ");
    scanf("%d", &year);
    
    // logic
    if (year % 400 == 0){
        printf("%d is a leap year", year);
    }
    else if (year % 100 == 0){
        printf("%d is not a leap year.", year);
    }
    else if (year % 4 == 0){
        printf("%d is a leap year.", year);
    }
    else {
        printf("%d is not a leap year.", year);
    }
    return 0;
}

Output 1

Enter the Year: 1944
1944 is a leap year.

Output 2

Enter the Year: 2026
2026 is not a leap year.

How Does This Program Work ?

    int year;

Here in this program, we have declared an int variable named as year.

    // Asking for Input
    printf("Enter the Year: ");
    scanf("%d", &year);

Then, the user is asked to enter the value of the year.

    // logic
    if (year % 400 == 0){
        printf("%d is a leap year", year);
    }
    else if (year % 100 == 0){
        printf("%d is not a leap year.", year);
    }
    else if (year % 4 == 0){
        printf("%d is a leap year.", year);
    }

After taking the input, the logical part of the program starts. If the year is perfectly divisible by 4, then it will be a leap year. If the year is divisible by 4 and 100, then it won’t be a leap year.

In that case, it will only be a leap year if it is perfectly divisible by both 4 and 400.

Some of the used terms are as follow: 

#include <stdio.h> – In the first line we have used #include, it is a preprocessor command that tells the compiler to include the contents of the stdio.h(standard input and output) file in the program. 

The stdio.h is a file which contains input and output functions like scanf() and printf() to take input and display output respectively. 

Int main() – Here main() is the function name and int is the return type of this function. The Execution of any Programming written in C language begins with main() function.

scanf() – scanf() function is used to take input from the user.  

printf() – printf() function is used to display and print the string under the quotation to the screen. 

% – It is known as Modulus Operator, used for division. It returns the remainder.

If. . . else – An if statement can be followed by an optional else statement, which executes when the Boolean expression is false. If Statement executes when the Boolean expression is True. 

// – Used for Commenting in C. 

Conclusion

I hope after reading this post, you understand to check whether a year is a leap year or not.

So, what are you waiting for, enter your birth year as input and check whether it’s a leap year or a normal year.

If you have any doubt regarding the topic, feel free to contact us in the Comment Section. We will be delighted to help you.