public void printEnum(PaperCurrency paperCurrency) {
        String output = null;
        // It's possible to do without a switch statement
        switch(paperCurrency) {
        case ONE:
            output = "$1";
            break;
        case FIVE:
            output = "$5";
            break;
        case TEN:
            output = "$10";
            break;
        case TWENTY:
            output = "$20";
            break;
        case FIFTY:
            output = "$50";
            break;
        case HUNDRED:
            output = "$100";
            break;
        }
        System.out.println(output);
    }