Java Topics
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Java Program to Check Even Number
Photo Credit to CodeToFun
π 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.
π Example
Let's delve into the Java code that accomplishes this task.
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.");
}
}
}
π» Testing the Program
To test the program with different numbers, modify the value of number in the main method.
10 is an even number.
π§ 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.
π Between the Given Range
Let's take a look at the Java code that checks for even numbers in the specified range.
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();
}
}
π» Testing the Program
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.
π§ 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.
π§ Understanding the Concept of Even Number
Before delving into the code, let's understand the concept of even numbers. An even number is an integer that is exactly divisible by 2.
In other words, when an even number is divided by 2, the remainder is zero.
π’ Optimizing the Program
While the provided program is straightforward, consider exploring and implementing alternative approaches or optimizations for checking even numbers.
Feel free to incorporate and modify this code as needed for your specific use case. Happy coding!
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