Example: Greatest of Three Numbers using Nested if-else in Java

// Greatest of Three Numbers using Nested if-else
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 and read three numbers
        Scanner scanner = new Scanner(System.in);

        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 2: Use nested if-else to find the greatest number
        int greatest;
        if (num1 >= num2) {
            if (num1 >= num3) {
                greatest = num1; // num1 is greatest
            } else {
                greatest = num3; // num3 is greatest (num1 was > num2, but num3 > num1)
            }
        } else { // num2 > num1
            if (num2 >= num3) {
                greatest = num2; // num2 is greatest
            } else {
                greatest = num3; // num3 is greatest (num2 was > num1, but num3 > num2)
            }
        }

        // Step 3: Print the greatest number
        System.out.println("The greatest number is: " + greatest);

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