In this tutorial you will learn about the Java Program to Check Leap Year and its application with practical example.
In this tutorial, we will learn to create a Java program that will Check Leap Year using Java programming.
Prerequisites
Before starting with this tutorial we assume that you are best aware of the following Java programming topics:
- Java Operators.
- Basic Input and Output
- Class and Object.
- Basic Java programming.
- If Else statements
- Loops.
What is Leap Year?
Logic behind to check whether a year is leap or not is:
Logic of Leap Year:
If the given value is completely divisible by 4, 100 and 400 then it is a leap year.
If the given value is divisible by 4 but not by 100 then it is a leap year.
Logic for not a Leap Year:
If the given value is not divisible by 4 then it is not a leap year
If the given value is divisible by 4 and 100 but not divisible by 400 then it is not a leap year.
For example,
- 1221 is not a leap year.
- 2000 is a leap year.
- 1890 is not a leap year.
Java Program to Check Leap Year
In this program we will check condition for Leap year or not. We would first declared and initialized the required variables. Next, we would prompt user to input the value for Year. Later we will find entered year is leap year or not.
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import java.util.Scanner; public class LeapYear { public static void main(String[] args) { int year ; boolean flag = false; // declaring avriables Scanner s = new Scanner(System.in); System.out.print("Enter any Year "); year = s.nextInt(); // taking value form user // if year is divided by 4 if (year % 4 == 0) { if (year % 100 == 0) { // if year is divided by 400 // then it is a leap year if (year % 400 == 0) flag = true; else flag = false; } // if the year is not century year else flag = true; } else flag = false; if (flag) System.out.println(year + " is a leap year."); else System.out.println(year + " is not a leap year."); } } |
Output
Leap Year.
Not a Leap Year.
In our program, we have first declared and initialized a set variables required in the program.
- year =taking year value from user.
- Flag= for holding true false value.
First of all we declare variable and take a value from user to check whether a year is leap or not is
then we check if the given value is completely divisible by 4, 100 and 400 then it is a leap year.
If the given value is divisible by 4 but not by 100 then it is a leap year. As shown in above .So this the logic behind of finding given year is a leap year or not.if value of flag is true then year is leap year
and is false than the given year is not.
