Java Program to Check Even Number

Posted in Java Tutorial

Updated on Nov 20, 2024

By Mari Selvan

👁️ 123 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In the realm of programming, dealing with numbers is a fundamental task. One common requirement is checking whether a given number is even or not. An even number is an integer that is exactly divisible by 2 without leaving a remainder.

In this tutorial, we will explore a Java program designed to check whether a given number is even. The program involves using the modulo operator to determine if the number is divisible by 2.

📄 Example

Let's delve into the Java code that accomplishes this task.

EvenNumberChecker.java

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import java.util.Scanner;

public class EvenNumberChecker {
  // Function to check if a number is even
  static boolean isEven(int number) {
    // If the remainder is zero, the number is even
    return number % 2 == 0;
  }

  // Driver program
  public static void main(String[] args) {
    // Replace this value with the number you want to check
    int number = 10;

    // Call the function to check if the number is even
    if (isEven(number)) {
      System.out.println(number + " is an even number.");
    } else {
      System.out.println(number + " is not an even number.");
    }
  }
}

💻 Testing the Program

To test the program with different numbers, modify the value of number in the main method.

Output

10 is an even number.

🧠 How the Program Works

The program defines a class EvenNumberChecker containing a static method isEven that takes an integer number as input and returns true if the number is even, and false otherwise.
Inside the main method, replace the value of number with the desired number you want to check.
The program calls the isEven method and prints the result using System.out.println.

📏 Between the Given Range

Let's take a look at the Java code that checks for even numbers in the specified range.

EvenNumberChecker.java

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public class EvenNumberChecker {

  // Function to check if a number is even
  static boolean isEven(int number) {
    return number % 2 == 0;
  }

  // Driver program
  public static void main(String[] args) {
    // Define the range (1 to 10)
    int startRange = 1;
    int endRange = 10;

    System.out.print("Even numbers in the range " + startRange + " to " + endRange + ":\n");

    // Check and print even numbers in the specified range
    for (int i = startRange; i <= endRange; i++) {
      if (isEven(i)) {
        System.out.print(i + " ");
      }
    }

    System.out.println();
  }
}

💻 Testing the Program

Output

Even numbers in the range 1 to 10:
2 4 6 8 10

Compile and run the program to see the even numbers in the specified range.

🧠 How the Program Works

The program defines a class EvenNumberChecker containing a static method isEven to check if a given number is even.
The main method sets the range (1 to 10) and iterates through the numbers in that range.
For each number, it checks if it is even using the isEven method and prints it if it is.