Java Program to Check Leap Year

In this article, we will understand how to check if the given year is a leap year. This is accomplished by checking if the given year is divisible by 4 and 100.

A leap year contains one additional day that is added to keep the calendar year synchronized with the astronomical year. A year that is divisible by 4 is known as a leap year. However, years divisible by 100 are not leap years while those divisible by 400 are.

Below is a demonstration of the same −

Input

Suppose our input is −

Enter a year: 2000

Output

The desired output would be −

2000 is a Leap year

Algorithm

Step 1 - START
Step 2 - Declare an integer values namely my_input and a Boolean value isLeap,
Step 3 - Read the required values from the user/ define the values
Step 4 - Check if the given year is divisible by 4 and 100 using an if-else condition
Step 5 - Display the result
Step 6 - Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in our coding ground tool .

import java.util.Scanner;
public class LeapYear {
   public static void main(String[] args) {
      int my_input;
      boolean isLeap = false;
      System.out.println("Required packages have been imported");
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("A reader object has been defined ");
      System.out.print("Enter the year : ");
      my_input = my_scanner.nextInt();
      if (my_input % 4 == 0) {
         if (my_input % 100 == 0) {
            if (my_input % 400 == 0)
               isLeap = true;
            else
               isLeap = false;
         }
         else
            isLeap = true;
      }
      else
         isLeap = false;
      if (isLeap)
         System.out.println(my_input + " is a Leap year");
      else
         System.out.println(my_input + " is not a Leap year");
   }
}

Output

Required packages have been imported
A reader object has been defined
Enter the year : 2000
2000 is a Leap year

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class LeapYear {
   public static void main(String[] args) {
      int my_input = 2000;
      boolean isLeap = false;
      System.out.println("The year is defined as " +my_input);
      if (my_input % 4 == 0) {
         if (my_input % 100 == 0) {
            if (my_input % 400 == 0)
               isLeap = true;
            else
               isLeap = false;
         }
         else
           isLeap = true;
      }
      else
      isLeap = false;
      if (isLeap)
         System.out.println(my_input + " is a Leap year");
      else
         System.out.println(my_input + " is not a Leap year");
   }
}

Output

The year is defined as 2000
2000 a Leap year