1. func interface2String(inter interface{}) {
    3.     switch inter.(type) {
    5.     case string:
    6.         fmt.Println("string", inter.(string))
    7.         break
    8.     case int:
    9.         fmt.Println("int", inter.(int))
    10.         break
    11.     case float64:
    12.         fmt.Println("float64", inter.(float64))
    13.         break
    14.     }
    16. }
    18. func main() {
    19.     interface2String("jack")
    20.     interface2String(1)
    21.     interface2String(12.223)
    22. }
    1. string jack
    2. int 1
    3. float64 12.223

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