Go Example--switch

package main

import (
    "fmt"
    "time"
)

func main()  {
    i := 2
    fmt.Print("write ", i, " as ")
    //switch 语句第一种使用方式，i与case去逐个匹配
    switch i {
    case 1:
        fmt.Println("one")
    case 2:
        fmt.Println("two")
    case 3:
        fmt.Println("three")
    }

    //case 可以通过逗号来分隔多个值
    switch time.Now().Weekday() {
    case time.Saturday, time.Sunday:
        fmt.Println("it's the wekend")
    default:
        fmt.Println("it's a weekday")
    }

    t := time.Now()
    //第二种switch方式，判断case是否为true
    //fallthrough 语句可以让当前case执行完后去执行下一个case
    switch  {
    case t.Hour() < 12:
        fmt.Println("it's before noon")
    default:
        fmt.Println("it's after noon")
    }
}