Go语言学习8-Switch

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1. // Switch
   
2. package main
   
3. 
   
4. import (
   
5.     "fmt"
   
6.     "time"
   
7. )
   
8. 
   
9. func main() {
   
10.     //Here’s a basic switch.
    
11.     i := 2
    
12.     fmt.Print("write ", i, " as ")
    
13.     switch i {
    
14.     case 1:
    
15.         fmt.Println("one")
    
16.     case 2:
    
17.         fmt.Println("two")
    
18.     case 3:
    
19.         fmt.Println("three")
    
20.     }
    
21.     //You can use commas to separate multiple expressions in the same case statement.
    
22.     //We use the optional default case in this example as well.
    
23.     switch time.Now().Weekday() {
    
24.     case time.Saturday, time.Sunday:
    
25.         fmt.Println("it's the weekend")
    
26.     default:
    
27.         fmt.Println("it's a weekday")
    
28.     }
    
29.     //switch without an expression is an alternate way to express if/else logic.
    
30.     //Here we also show how the case expressions can be non-constants.
    
31.     t := time.Now()
    
32.     switch {
    
33.     case t.Hour() < 12:
    
34.         fmt.Println("it's before noon")
    
35.     default:
    
36.         fmt.Println("it's after noon")
    
37.     }
    
38. }

转自https://gobyexample.com