import java.util.Scanner;

import static java.lang.Integer.*;

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

        int operator;
        Double number1, number2, result;


        Scanner input = new Scanner(System.in);


        do {


            System.out.println("\nEnter your Choice: \n1.Addition \n2.Subtraction \n3.Multiplication \n4.Division \n5.exit");
            operator = input.nextInt();
           

                System.out.println("Enter first number");
                number1 = input.nextDouble();

                System.out.println("Enter second number");
                number2 = input.nextDouble();

                switch (operator) {


                    case 1:
                        result = number1 + number2;
                        System.out.println(number1 + " + " + number2 + " = " + result);
                        break;


                    case 2:
                        result = number1 - number2;
                        System.out.println(number1 + " - " + number2 + " = " + result);
                        break;


                    case 3:
                        result = number1 * number2;
                        System.out.println(number1 + " * " + number2 + " = " + result);
                        break;


                    case 4:
                        result = number1 / number2;
                        System.out.println(number1 + " / " + number2 + " = " + result);
                        break;
                    case 5:
                        System.out.println("Execution Successful");
                        break;

                    default:
                        System.out.println("Enter a valid choice");
                        break;
                }

        }while(operator!=5);

       input.close();
    }
}
