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golang 型switch記法

Posted at

golang勉強。
型switch記法というのが本に載ってたので、動くように書いてみた。
どの値を入れるとどう返すかをint型だけにして、main の中で直接書いてみた。

package main
  
import "fmt"

func main() {

        var x interface{} = 4  //この値をswitchのcaseで判定
        switch x := x.(type) {
        case int:
                fmt.Printf("%#v %T\n", x, x)
        }

        fmt.Println("Hello")
}

reflectを使ってtypeを判定する例

package main

import (
    "fmt"
    "reflect"
)

func main() {
    var x float64 = 3.4
    fmt.Println("type:", reflect.TypeOf(x))
}

参考

Go言語の型とreflect

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