Data Type

import java.util.Scanner;

public class DataType {


    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String word = scanner.nextLine();
        String data = scanner.nextLine();


        while ((!"".equals(word))&&(!"".equals(data))) {


            System.out.println(isType(word, data));
            word = scanner.nextLine();
            data = scanner.nextLine();
        }
    }

    private static String isType(String word, String data) {

        String result = "";

        switch (word) {
            case "int": {
                int res = 0;

                int dataT = Integer.parseInt(data);
                res = dataT * 2;
                result = String.format("%d", res);
            }
            break;
            case "real": {
                double res = 0;

                double dataT = Double.parseDouble(data);
                res = dataT * 1.5;
                result = String.format("%.2f", res);

            }
            break;
            case "string": {
              //  String result = "";

                String dataT = data;
                result = String.format("$%s$", dataT);

            }
            break;
        }
            return result;
        }

    }