java - How can I add exponent in my code -

import java.util.scanner;  public class calculator {     public static void main(string[] args )     {        scanner userinput = new scanner(system.in);        string operator;        double num1,num2,answer = 0;         system.out.println("enter first number: ");        num1 = userinput.nextdouble();        system.out.println("enter operator: ");        operator = userinput.next();        system.out.println("enter second number: ");        num2 = userinput.nextdouble();         if (operator.equals ("+")){           answer = num1 + num2;        }        else if (operator.equals ("-")){           answer = num1 - num2;        }        else if (operator.equals ("*")){           answer = num1 * num2;        }        else if (operator.equals ("/")){           answer = num1 / num2;        }        system.out.println("first number:" + num1);        system.out.println("operator:" + operator);        system.out.println("second number:" + num2);        system.out.println("answer: " + answer);    } } 

use function:

   math.pow(x, y) 

in way: place code

   else if (operator.equals ("^")){       answer = math.pow(num1, num2);    } 

just after present code

   else if (operator.equals ("/")){       answer = num1 / num2;    } 

so part of code be

   else if (operator.equals ("/")){       answer = num1 / num2;    }    else if (operator.equals ("^")){       answer = math.pow(num1, num2);    }