package main type Bank int const ( Chase Bank = iota + 1 Citi UCCU BankOfAmerica Fidelity Amex ) func (b Bank) String() string { switch b { case Fidelity: return "Fidelity" case BankOfAmerica: return "BankOfAmerica" case Chase: return "Chase" case Citi: return "Citi" case UCCU: return "UCCU" case Amex: return "AmericanExpress" } return "?" }