def is_leap(year):

    if year % 4 == 0:

        if year % 100 == 0:

            if year % 400 == 0:

                print('True')

            else:

                print('False')

        else:

            print('True')

    else:

        print('False')

​

  public static void main(String[] args) {

        int year = 2005;

​

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

            System.out.println(year+" leap year");

        }else {

            System.out.println(year+" not a leap year");

        }

    }

$day = [ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];

$year = 2021;

​

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

  $day = [ 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 ];

  echo "This is leap year - get 366 day";

} else {

   echo "This is NOT leap year - get ONLY 365 day";

}

​

year = int(input("Enter a year: "))

​

if year % 400 == 0 or (year % 4 == 0 and year % 100 != 0):

    print(year, "is a leap year")

else:

    print(year, "is not a leap year")

import java.util.Scanner;

​

public class LeapYearChecker {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter a year: ");

​

        int year = Integer.parseInt(scanner.nextLine());

​

        String result = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0)) ? "is a leap year." : "is not a leap year.";

        System.out.println(year + " " + result);

​

        scanner.close();

    }

}