Slip No 11 Q A

Q.Write a menu driven java program using command line arguments for the following: [15 M]
1. Addition
2. Subtraction
3. Multiplication
4. Division.

public class MenuCalculator {
    public static void main(String[] args) {

        // Check arguments count
        if (args.length != 3) {
            System.out.println("Usage: java MenuCalculator <num1> <num2> <choice>");
            System.out.println("Choice: 1-Add 2-Sub 3-Mul 4-Div");
            return;
        }

        // Read command line arguments
        double num1 = Double.parseDouble(args[0]);
        double num2 = Double.parseDouble(args[1]);
        int choice = Integer.parseInt(args[2]);

        double result;

        switch (choice) {
            case 1:
                result = num1 + num2;
                System.out.println("Addition = " + result);
                break;

            case 2:
                result = num1 - num2;
                System.out.println("Subtraction = " + result);
                break;

            case 3:
                result = num1 * num2;
                System.out.println("Multiplication = " + result);
                break;

            case 4:
                if (num2 == 0)
                    System.out.println("Division by zero not possible.");
                else {
                    result = num1 / num2;
                    System.out.println("Division = " + result);
                }
                break;

            default:
                System.out.println("Invalid Choice.");
        }
    }
}