تحديات برمجيةالتحدي الثاني - حل التمرين الخامس بلغة جافا

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        
        Scanner input = new Scanner(System.in);
        double a, b;
        int option = -1;
        
        System.out.print("Enter first number: ");
        a = input.nextDouble();
        
        System.out.print("Enter second number: ");
        b = input.nextDouble();
        
        System.out.println(
                "\nWrite down the operation number then press enter\n"
                + "0: To end the program.\n"
                + "1: To print the sum.\n"
                + "2: To print the subtraction.\n"
                + "3: To print the multiplication.\n"
                + "4: To print the division.");
        
        while (option != 0)
        {
            System.out.println("-------------------------");
            System.out.print("Enter option: ");
            option = input.nextInt();
            
            switch (option)
            {
                case 0:
                    System.out.println("Program end.");
                    break;
                case 1:
                    System.out.println(a + " + " + b + " = " + (a + b));
                    break;
                case 2:
                    System.out.println(a + " - " + b + " = " + (a - b));
                    break;
                case 3:
                    System.out.println(a + " * " + b + " = " + (a * b));
                    break;
                case 4:
                    System.out.println(a + " / " + b + " = " + (a / b));
                    break;
            }
        }
        
    }

}