# Java Program to Check Leap Year or not

## Check Whether or Not the Year is a Leap Year in Java

We will write Leap Year Program in Java. Given an integer input “year” the objective is to check if the given year is a leap year or not using the conditions for a leap year. Therefore, keeping them in mind we write a code to Check Whether or Not the Year is a Leap Year in Java Language.

```Example
Input : 2024
Output: Leap Year
``` ## Check Whether or Not the Year is a Leap Year in Java

Given an integer input for the year, the objective is to check whether or not the user given input “year” is a Leap year or not. In order to do so we check if the integer input satisfies the conditions for a leap year mentioned below. Therefore, we write a Java code to check and tell if it’s a leap year or not. Some of the methods to check for leap year are mentioned below

• Method 1: Using if-else Statements 1
• Method 2: Using if-else Statements 2
• Method 3: Using Ternary Operator
• Method 4: Bonus Boolean method

We’ll discuss the above-mentioned methods in detail in the upcoming sections. Before we get to coding check the blue box below for better understanding.

### Working

For the input integer “year” we perform the following

• Check if the year variable is divisible by 400.
• Check if the year variable is divisible by 4 but not by 100.
• If the above conditions are satisfied, print it’s a Leap year. It’s not a Leap Year otherwise.

Let’s try and implement the above mentioned logic in Java Language.

### Java Code

Run
```// Leap year program in Java
// If the year satisfies either of the conditions, it's considered a leap year -
// 1. The year must be divisible by 400.
// 2. The year must be divisible by 4 but not 100.
public class Main{
public static void main (String[]args)
{

int year = 2020;

if (year % 400 == 0)
System.out.println (year + " is a Leap Year");

else if (year % 4 == 0 && year % 100 != 0)
System.out.println (year + " is a Leap Year");

else
System.out.println (year + " is not a Leap Year");

}
}
```

### Output

```2020 is a Leap Year
```

### Working

For a given integer variable “year”, we check for the following

• If the year variable is divisible by 400 or is it divisible by 4 but not 100.
• Print it’s a Leap Year if true, Print it’s not a Leap year otherwise.

Let’s implement the above logic in Java Language.

### Java Code

Run
```public class Main
{
public static void main (String[]args)
{

int year = 2020;

if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
System.out.println (year + " is a Leap Year");

//not leap year
else
System.out.println (year + " is not a Leap Year");

}
}
```

### Output

```2020 is a Leap Year
```

### Working

In this method we’ll use the knowledge of ternary operators. To know more about ternary operators in C, check out Ternary operators in C.

For a given input integer variable “year”, we check for the following using the ternary operator

• Check if the year variable is divisible by 400 or divisible by 4 but not 100.
• If either of the above mentioned conditions are satisfied, print it’s a Leap Year. Print it’s not a Leap Year otherwise.

Let’s implement the above mentioned logic in Java Language.

### Java Code

Run
```public class Main
{
public static void main (String[]args)
{

int year = 2019;

int flag = (year%400 == 0) || (year%4==0 && year%100!=0 ) ? 1 : 0;
if (flag ==1)
{
System.out.println (year + " is a Leap Year");
}
else
{
System.out.println (year + " is not a Leap Year");
}
}
}
```

### Output

```2019 is not a Leap Year
```

### Java Code

Run
```class Main {

public static void main(String[] args) {

// If the year satisfies either of the conditions, it's considered a leap year -
// 1. The year must be divisible by 400.
// 2. The year must be divisible by 4 but not 100.
int year = 2020;
boolean leap;

if (year % 400 == 0)
leap = true;

else if (year % 4 == 0 && year % 100 != 0)
leap = true;

else
leap = false;

if (leap)
System.out.println(year + " is a leap year.");
else
System.out.println(year + " is not a leap year.");
}
}
```

### Output

```2020 is not a Leap Year
```

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