#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); }