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")
	}
}