Write program to check whether a year is leap year or not.

 to check whether a year is leap year or not.

#include <iostream>

using namespace std;

int main()

 {

    int year;

    cout << "Enter a year: ";

    cin >> year;

    if (year % 4 == 0) {

        if (year % 100 == 0) {

            if (year % 400 == 0)

                cout << year << " is a leap year.";

            else

                cout << year << " is not a leap year.";

        }

        else

            cout << year << " is a leap year.";

    }

    else

        cout << year << " is not a leap year.";

    return 0;

}