Unlock the Secrets of Leap Years in C Programming

The Rules of Leap Years

A leap year is precisely divisible by 4, except for century years (those ending with 00). However, there’s a catch – a century year is only considered a leap year if it’s perfectly divisible by 400. This means that 1999 is not a leap year, while 2000 and 2004 are.

Crafting the Perfect Program

Now that we’ve grasped the rules, let’s create a C program that can check whether a given year is a leap year or not. Our program will utilize the if…else statement, a crucial element in C programming, to evaluate the input year.

#include <stdio.h>

int main() {
    int year;
    printf("Enter a year: ");
    scanf("%d", &year);

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

    return 0;
}

Testing Our Program

Let’s put our program to the test! We’ll run it with two different inputs to see how it performs.

• Output 1:

  
  Enter a year: 1999
  1999 is not a leap year
          

• Output 2:

  
  Enter a year: 2000
  2000 is a leap year
          

With our program, we can confidently determine whether a given year is a leap year or not. By mastering this concept, you’ll be well on your way to becoming a proficient C programmer.