Example: GreatestOfThreeUsingNestedIfElse in Java

// GreatestOfThreeUsingNestedIfElse
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
        Scanner scanner = new Scanner(System.in);

        // Step 2: Get three numbers from the user
        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 nested if-else to find the greatest number
        if (num1 >= num2) {
            if (num1 >= num3) {
                System.out.println(num1 + " is the greatest number.");
            } else {
                System.out.println(num3 + " is the greatest number.");
            }
        } else { // num2 > num1
            if (num2 >= num3) {
                System.out.println(num2 + " is the greatest number.");
            } else {
                System.out.println(num3 + " is the greatest number.");
            }
        }

        // Step 4: Close the scanner
        scanner.close();
    }
}