Example: Greatest of Three Numbers using Nested If in Java

// Greatest of Three Numbers using Nested If
import java.util.Scanner;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        // Step 1: Initialize Scanner for input
        Scanner input = new Scanner(System.in);

        // Step 2: Prompt user for three numbers
        System.out.print("Enter first number: ");
        int num1 = input.nextInt();

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

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

        // Step 3: Implement nested if-else logic to find the greatest
        int greatest;

        if (num1 >= num2) {
            // If num1 is greater than or equal to num2, compare num1 with num3
            if (num1 >= num3) {
                greatest = num1; // num1 is the greatest
            } else {
                greatest = num3; // num3 is the greatest
            }
        } else {
            // If num2 is greater than num1, compare num2 with num3
            if (num2 >= num3) {
                greatest = num2; // num2 is the greatest
            } else {
                greatest = num3; // num3 is the greatest
            }
        }

        // Step 4: Display the result
        System.out.println("The greatest number is: " + greatest);

        // Step 5: Close the scanner
        input.close();
    }
}