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A leap year is a calendar year in which an additional day is added to February month. In a leap year, the number of days in February month and the year are 29 and 366 respectively. A year that is not a leap year is called a common year. A year is said to be a leap year if:

  • it is divisible by 4.
  • it is divisible by 4 but not divisible by 100.
  • it is divisible by 4, 100 and 400.

Method 1: Using conditional statements

In the below example, conditional statements are used to identify a leap year.

public class MyClass {
  public static void main(String[] args) {
    int year = 2019;
    if (year % 400 == 0) {
       System.out.println(year + " is a leap year.");
    } else if (year % 100 == 0) {
       System.out.println(year + " is not a leap year.");
    } else if (year % 4 == 0) {
       System.out.println(year + " is a leap year.");
    } else {
       System.out.println(year + " is not a leap year.");
    }
  }
}

The above code will give the following output:

2019 is not a leap year.

Method 2: Using Method

In the below example, a method called leapyear() is created which takes year as argument and prints whether the passed year is a leap year or not.

public class MyClass {
  static void leapyear(int year) {
    if (year % 400 == 0) {
       System.out.println(year + " is a leap year.");
    } else if (year % 100 == 0) {
       System.out.println(year + " is not a leap year.");
    } else if (year % 4 == 0) {
       System.out.println(year + " is a leap year.");
    } else {
       System.out.println(year + " is not a leap year.");
    }
  }
  public static void main(String[] args) {
    leapyear(2019);
  }
}

The above code will give the following output:

2019 is not a leap year.




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