leap year

#include <stdio.h>

int main()
{
    int year;

    printf("Enter a year: ");
    scanf("%d",&year);

    if(year%4==0 || year%100==0 && year%400==0)
    {

            printf("%d is a leap year.", year );
    }
    else
        printf("%d is not a leap year.", year);

    return 0;
}