public static void main(String[] args) {
        Scanner consoleScanner = new Scanner(System.in);
        while (true) {
            System.out.print("Would you like to do: [1] convert celsius to fahrenheit, [2] convert fahrenheit to celsius, [3] quit: ");
            int input = 0;
            input = consoleScanner.nextInt();
            if (input == 1) {
                celsius(consoleScanner);
            } else if (input == 2) {
                fahrenheit(consoleScanner);
            } else if (input == 3) {
                System.exit(0);
            }

        }
    }