4. Write a C program to check given year is a Leap year or not.

#include<stdio.h>

#include<conio.h>

void main()

{

    int year;

    clrscr();

    printf("enter year: ");

    scanf("%d",&year);

    if(year % 4 == 0)

    {

        printf("\nyear is leap year");

    }

    else if(year % 400 == 0)

    {

        printf("\nyear is leap year");

    }

    else

    {

        printf("\nyear is not leap year");

    }

    getch();

}

/*      output:

enter year: 2020

year is leap year

*/