#include <stdio.h>
void main(void)
{
int year;
printf("Enter a year to check if it is Leap Year\n");
scanf("%d",&year);
if(year%400==0) /* Why mod 400 */
printf("%d is a Leap Year\n",year);
else if(year%100==0) /* Why mod 100 */
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);
}