package main

import "fmt"

func MyPrintf(args ...interface{}){

    for _, arg := range args {

        switch arg.(type) {

        case int :

            fmt.Println("\"", arg, "\"", "is an int value.")

        case string :

            fmt.Println("\"", arg, "\"", "is a string value.")

        case int64 :

            fmt.Println("\"", arg, "\"", "is an int64 value.")

            default :

            fmt.Println("\"", arg, "\"", "is an unknown type.")

        }

    }

}

func main(){

    var v1 int = 1

    var v2 int64 = 234

    var v3 string = "hello"

    var v4 float32 = 1.123

    MyPrintf(v1, v2, v3, v4)

}

$ go run myprintf.go

" 1 " is an int value.

" 234 " is an int64 value.

" hello " is a string value.

" 1.123 " is an unknown type.