C Program to check Leap Year

C program to check leap year: c code to check leap year, year will be entered by the user.

C programming code

#include <stdio.h>
 
int main()
{
  int year;
 
  printf("Enter a year to check if it is a leap year\n");
  scanf("%d", &year);
 
  if ( year%400 == 0)
    printf("%d is a leap year.\n", year);
  else if ( year%100 == 0)
    printf("%d is not a leap year.\n", year);
  else if ( year%4 == 0 )
    printf("%d is a leap year.\n", year);
  else
    printf("%d is not a leap year.\n", year);  
 
  return 0;
}

Download Leap year program.

Output of program:

Please read the leap year article at Wikipedia, it will help you to understand the program. This code is based on Gregorian Calendar.