Currency Converter Java

import java.util.Scanner;

public class p12_CurrencyConverter {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        double amount = Double.parseDouble(scan.nextLine());
        String inputCurrency = scan.nextLine();
        String outputCurrency = scan.nextLine();

        double bgn = 0;
        double exchangeResult = 0;

        switch (inputCurrency) {
            case "BGN":
                bgn = amount;
                break;
            case "USD":
                bgn = amount * 1.79549;
                break;
            case "EUR":
                bgn = amount * 1.95583;
                break;
            case "GBP":
                bgn = amount * 2.53405;
                default:
                    System.out.println("Error!");
                    break;
        }
        switch (outputCurrency) {
            case "BGN":
                exchangeResult = bgn;
                break;
            case "USD":
                exchangeResult = bgn / 1.79549;
                break;
            case "EUR":
                exchangeResult = bgn / 1.95583;
                break;
            case "GBP":
                exchangeResult = bgn / 2.53405;
                break;
            default:
                System.out.println("Error!");
                break;
        }
        System.out.printf("%.2f %s", exchangeResult, outputCurrency);
    }
}