C Program to check whether the year is Leap or not

  #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;
  }