enum.go

package main

import "fmt"

type day int
const (
  Sunday day = iota
  Monday
  Tuesday
  Wednesday
  Thursday
  Friday
  Saturday
)

var dayNames = [...]string{
  "Sunday", "Monday", "Tuesday", "Wednesday",
  "Thursday", "Friday", "Saturday",
}

func (d day) String() string {
  return dayNames[d]
}

func main() {
	fmt.Println(Tuesday)
}