switch _ golang

switch 1: 在条件语句中，可以写多条的语句

　　　 2: 也可以不添加语句

package main

import (
    "fmt"
    "time"
)

func main() {

    i := 2
    fmt.Println("write ", i, " as ")

    switch i {
    case 1:
        fmt.Println("one")
    case 2:
        fmt.Println("two")
    case 3:
        fmt.Println("three")
    }

    switch time.Now().Weekday() {
    case time.Saturday, time.Sunday:
        fmt.Println("it's the weekend")
    default:
        fmt.Println("it's a weekday")
    }

    t := time.Now()
    switch {
    case t.Hour() < 12:
        fmt.Println("it's before noon")
    default:
        fmt.Println("it's after noon")
    }

}

write  2  as 
two
it's a weekday
it's after noon