Calculator Using Switch Case in Java

  import java.util.*;

class CalculatorUsingSwitchCase

{

public static void main(String[] args)

{

char operator;

double result;

Scanner input = new Scanner(System.in);

System.out.println("Enter First Number");

double n1 = input.nextDouble();

System.out.println("Enter Second Number");

double n2 = input.nextDouble();

System.out.println("Choose an Opeartor : + , - , * , / , or %");

operator = input.next().charAt(0); 

switch (operator)

{

case '+' :

result = n1 + n2;

System.out.println("Addition of " +n1+ " and " + n2+ " is "  + result);

break;

case '-' :

result = n1-n2;

System.out.println("Subraction of " +n1+ " and " + n2+ " is "  + result);

break;

case '*' :

result = n1*n2;

System.out.println("Multiplication of " +n1+ " and " + n2+ " is "  + result);

break;

case '/' :

result = n1/n2;

System.out.println("Division of " +n1+ " and " + n2+ " is "  + result);

break;

case '%' :

result =(n1*n2)/100;

System.out.println("Percntage of " +n1+ " and " + n2+ " is "  + result);

break;

default :

System.out.println("Invalid Case");

break;

}

input.close();

}

}

Input  :-

Enter First Number :-20

Enter Second Number :-14

Choose an Operator : +

Output :-

Addition of 20 and 14 is 34