Example: Largest of Three Numbers using Nested If-Else in Java

// Largest 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: Declare variables to store the three numbers
        int num1, num2, num3;

        // Step 2: Create a Scanner object to get user input
        Scanner scanner = new Scanner(System.in);

        // Step 3: Prompt the user to enter the three numbers
        System.out.print("Enter the first number: ");
        num1 = scanner.nextInt();

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

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

        // Step 4: Determine the largest number using nested if-else statements
        int largest;

        if (num1 >= num2) {
            if (num1 >= num3) {
                largest = num1; // num1 is largest
            } else {
                largest = num3; // num3 is largest
            }
        } else { // num2 > num1
            if (num2 >= num3) {
                largest = num2; // num2 is largest
            } else {
                largest = num3; // num3 is largest
            }
        }

        // Step 5: Print the largest number
        System.out.println("The largest number is: " + largest);

        // Step 6: Close the scanner to prevent resource leak
        scanner.close();
    }
}