Example: GreatestOfThreeUsingIfElse in Java

// GreatestOfThreeUsingIfElse
import java.util.Scanner;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        // Step 1: Create a Scanner object to read user input
        Scanner scanner = new Scanner(System.in);

        // Step 2: Prompt the user to enter three numbers
        System.out.print("Enter the first number: ");
        int num1 = scanner.nextInt();

        System.out.print("Enter the second number: ");
        int num2 = scanner.nextInt();

        System.out.print("Enter the third number: ");
        int num3 = scanner.nextInt();

        // Step 3: Use if-else if-else to find the greatest number
        if (num1 >= num2 && num1 >= num3) {
            System.out.println(num1 + " is the greatest number.");
        } else if (num2 >= num1 && num2 >= num3) {
            System.out.println(num2 + " is the greatest number.");
        } else {
            System.out.println(num3 + " is the greatest number.");
        }

        // Step 4: Close the scanner to prevent resource leaks
        scanner.close();
    }
}