Java: Test a year is a leap year or not

Java Conditional Statement: Exercise-9 with Solution

Write a Java program that takes a year from the user and prints whether it is a leap year or not.

Test Data
Input the year: 2016

Pictorial Presentation:

Java conditional statement Exercises: Test a year is a leap year or not

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise9 {

  public static void main(String[] args)
        Scanner in = new Scanner(System.in);

        System.out.print("Input the year: ");
        int year = in.nextInt();

        boolean x = (year % 4) == 0;
        boolean y = (year % 100) != 0;
        boolean z = ((year % 100 == 0) && (year % 400 == 0));

        if (x && (y || z))
            System.out.println(year + " is a leap year");
            System.out.println(year + " is not a leap year");

Sample Output:

Input the year: 2016                                                                                          
2016 is a leap year


Flowchart: Java Conditional Statement Exercises - Test a year is a leap year or not

Java Code Editor:

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Previous: Write a Java program that takes the user to provide a single character from the alphabet. Print Vowel of Consonant, depending on the user input. If the user input is not a letter (between a and z or A and Z), or is a string of length > 1, print an error message.
Next: Write a program in Java to display the first 10 natural numbers.

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Java: Tips of the Day


Checks if a value is positive power of two.

To understand how it works let's assume we made a call IsPowerOfTwo(4).

As value is greater than 0, so right side of the && operator will be evaluated.

The result of (~value + 1) is equal to value itself. ~100 + 001 => 011 + 001 => 100. This is equal to value.

The result of (value & value) is value. 100 & 100 => 100.

This will value the expression to true as value is equal to value.

public static boolean isPowerOfTwo(final int value) {
    return value > 0 && ((value & (~value + 1)) == value);

Ref: https://bit.ly/3sA5d4I


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