GO语言练习：switch基本用法

妖狐艹你老母 2022-02-02 07:17 299阅读 0赞

1、代码

![复制代码][copycode.gif]

1 package main
     2 import "fmt"
     3 
     4 func switch_1(i int){
     5     switch i { 
     6     case 0 : 
     7         fmt.Println("0 --: i = ", i); 
     8     case 1:
     9         fmt.Println("1 --: i = ", i); 
    10     case 2:
    11         fmt.Println("2 --: i = ", i); 
    12         fallthrough
    13     case 3:
    14         fmt.Println("3 --: i = ", i); 
    15     case 4, 5, 6:
    16         fmt.Println("4, 5, 6 --: i = ", i); 
    17         default :
    18         fmt.Println("Default --: i = ", i); 
    19     }   
    20 }
    21 
    22 func switch_2(i int){
    23     switch {
    24     case 0 <= i && i <= 3 :
    25         fmt.Println("0-3: i = ", i)
    26     case 4 <= i && i <= 6 :
    27         fmt.Println("4-6: i = ", i)
    28     case 7 <= i && i <= 9 :
    29         fmt.Println("7-9: i = ", i)
    30     }
    31 }
    32 
    33 func main(){
    34     for i := 0; i <= 6; i++ {
    35         switch_1(i)
    36     }
    37     fmt.Println("------------------------------")
    38     for i := 0; i <= 6; i++ {
    39         switch_2(i)
    40     }
    41 }

![复制代码][copycode.gif]

2、运行

![复制代码][copycode.gif]

$ go run switch.go 
    0 --: i =  0
    1 --: i =  1
    2 --: i =  2
    3 --: i =  2
    3 --: i =  3
    4, 5, 6 --: i =  4
    4, 5, 6 --: i =  5
    4, 5, 6 --: i =  6
    ------------------------------
    0-3: i =  0
    0-3: i =  1
    0-3: i =  2
    0-3: i =  3
    4-6: i =  4
    4-6: i =  5
    4-6: i =  6

![复制代码][copycode.gif]

本文转自郝峰波博客园博客，原文链接：http://www.cnblogs.com/fengbohello/p/4617522.html，如需转载请自行联系原作者

[copycode.gif]: /images/20220202/112d9e2b7bbe408787284e7cfcbeec4d.png