Calculator in Java

 Calculator

Source Code

package calculator;

import java.util.Scanner;

public class calculator

{

public static void main(String args[])

{

char operator;

double n1,n2,res;

System.out.println("Choose the operator: +,-,*,/");

Scanner s1=new Scanner(System.in);

operator=s1.next().charAt(0);

System.out.println("Enter the first number:");

n1=s1.nextInt();

System.out.println("Enter the second number:");

n2=s1.nextInt();

switch(operator)

{

case '+':

res=n1+n2;

System.out.println(n1+ "+"+ n2+"="+res);

break;

case '-':

res=n1-n2;

System.out.println(n1+ "-"+ n2+"="+res);

break;

case '*':

res=n1*n2;

System.out.println(n1+ "*"+ n2+"="+res);

break;

case '/':

res=n1/n2;

System.out.println(n1+ "/"+ n2+"="+res);

break;

}

}

}

Output