Java Program to Make a Simple Calculator Using switch..case Statement

//Java Program to Make a Simple Calculator Using switch case Statement

import java.util.Scanner;

public class JavaPrograms {

	public static void main(String[] args) {

		char operator;
		Double number1, number2, result;

		// create an object of Scanner class
		Scanner sc = new Scanner(System.in);

		// ask users to enter operator
		System.out.println("Choose an operator: +, -, *, or /");
		operator = sc.next().charAt(0);

		// ask users to enter numbers
		System.out.println("Enter first number");
		number1 = sc.nextDouble();

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

		switch (operator) {

		// performs addition between numbers
		case '+':
			result = number1 + number2;
			System.out.println(number1 + " + " + number2 + " = " + result);
			break;

		// performs subtraction between numbers
		case '-':
			result = number1 - number2;
			System.out.println(number1 + " - " + number2 + " = " + result);
			break;

		// performs multiplication between numbers
		case '*':
			result = number1 * number2;
			System.out.println(number1 + " * " + number2 + " = " + result);
			break;

		// performs division between numbers
		case '/':
			result = number1 / number2;
			System.out.println(number1 + " / " + number2 + " = " + result);
			break;

		default:
			System.out.println("Invalid operator!");
			break;
		}

		sc.close();
	}
}