Go基础之Switch

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我是靠谱客的博主聪慧花瓣，这篇文章主要介绍Go基础之Switch，现在分享给大家，希望可以做个参考。

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package main

import (
	"fmt"
	"math/rand"
	"time"
)

func Switch_One() {
	rand.Seed(time.Now().Unix())
	num := rand.Intn(100)
	//Switch后无条件表达式时相当于多个if else
	//注意此时不能再跟num
	switch {
	case num > 90:
		fmt.Println("hight num.", num)
	case num > 50 && num < 90:
		fmt.Println("simple num.", num)
	case num < 50:
		fmt.Println("low num.", num)
	default:
		fmt.Println("default", num)
	}
}

func Switch_Two() {
	rand.Seed(time.Now().Unix())
	num := rand.Intn(3)
	//Switch后有表达式
	//fallthrough相当于continue
	//不用break跳出
	switch num {
	case 0:
		fallthrough
	case 1:
		fmt.Println("rand num is 1.")
	case 2:
		fmt.Println("rand num is 2.")
	case 3:
		fmt.Println("rand num is 3.")

	}
}
func main() {
	fmt.Println("First:")
	Switch_One()
	fmt.Println("Second:")
	Switch_Two()
}