Question

JAVA PROGRAMMING

Hi! I need to create a calculator using do/while loop that calls a menu switch where the user choice the calculation type. In the switch each case calls a method to each type of calculation (addition/subtraction/division/multiply/ change set of numbers in the array) those methods sends back the result to be displayed in another method.

This application needs to hold the user input's numbers as an array.

Thanks for your time. It is a great help!

Answer 1

simple Java code to create a calculator using switch statements:

import java.util.Scanner;

public class JavaExample {

    public static void main(String[] args) {

        double num1, num2;
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter first number:");

       
        num1 = scanner.nextDouble();
        System.out.print("Enter second number:");
        num2 = scanner.nextDouble();

        System.out.print("Enter an operator (+, -, *, /): ");
        char operator = scanner.next().charAt(0);

        scanner.close();
        double output;

        switch(operator)
        {
            case '+':
                output = num1 + num2;
                break;

            case '-':
                output = num1 - num2;
                break;

            case '*':
                output = num1 * num2;
                break;

            case '/':
                output = num1 / num2;
                break;

           
            default:
                System.out.printf("You have entered wrong operator");
                return;
        }

        System.out.println(num1+" "+operator+" "+num2+": "+output);
    }
}

Let me know if you have any doubts or if you need anything to change. 

If you are satisfied with the solution, please leave a +ve feedback : ) Let me know for any help with any other questions.

Thank You!
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