Go语言学习之Switch语句的使用

// Convert hexadecimal character to an int value
 switch {
 case '0' <= c && c <= '9':
     return c - '0'
 case 'a' <= c && c <= 'f':
     return c - 'a' + 10
 case 'A' <= c && c <= 'F':
     return c - 'A' + 10
 }
 return 0

package main

import "fmt"

func main() {
    i := 3
    switch i {
    case i > 0:
        fmt.Println("condition 1 triggered")
        fallthrough
    case i > 2:
        fmt.Println("condition 2 triggered")
        fallthrough
    default:
        fmt.Println("Default triggered")
    }
}

switch i {
    case 0, 1:
        f()
    default:
        g()
}

package main
  
import "fmt"
  
func main() {
    var value interface{}
    switch q:= value.(type) {
       case bool:
       fmt.Println("value is of boolean type")
       case float64:
       fmt.Println("value is of float64 type")
       case int:
       fmt.Println("value is of int type")
       default:
       fmt.Printf("value is of type: %T", q)
   }
}

var value interface{}

switch q:= value.(type) {

value is of type: <nil>

package main

import "fmt"

func valueType(i interface{}) {
    switch q:= i.(type) {
       case bool:
       fmt.Println("value is of boolean type")
       case float64:
       fmt.Println("value is of float64 type")
       case int:
       fmt.Println("value is of int type")
       default:
       fmt.Printf("value is of type: %T\n", q)

   }
}

func main() {
    person := make(map[string]interface{}, 0)

    person["name"] = "Alice"
    person["age"] = 21
    person["height"] = 167.64

    fmt.Printf("%+v\n", person)

    for _, value := range person {
        valueType(value)
    }
}