Java program for a calculator using switch case
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
Scanner reader = new Scanner(System.in);
System.out.print("Enter two numbers");
double first = reader.nextDouble();
double second = reader.nextDouble();
System.out.print("Enter an operators");
char operator = reader.next().charAt(0);
double result;
switch(operator)
{
case '+':
result = first + second;
break;
case '-':
result = first - second;
break;
case '*':
result = first * second;
break;
case '/':
result = first / second;
break;
default:
System.out.printf("operator is correct");
return;
}
System.out.printf("%.1f %c %.1f = %.1f", first, operator, second, result);
}
}