public void exponentiation (){
        System.out.println("You have chosen exponentiation!");
        data.setNumberToBeBaseForExponentiation();
        data.setPower();
        int result = 1;
            for (int i = 1; i <= data.getSecondNumber(); i++) {
                result *= data.getFirstNumber();
            }
        System.out.println("Result is: " + result + '\n');
    }