go错误是否退出

func Demoquit(str *string) error {
   if str == nil {
      //log.Fatalf("is a not init object")  //exit
      fmt.Println("is a not init object") // no exit
      //return errors.New("is not init point") // exit
   }
   return nil
}

func main() {
   var str *string
   Demoquit(str)
   fmt.Println("is not exec")

}