You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: blackriper.go
    path of file: ./repos/retos-programacion-2023/Retos/Reto #35 - PRIMEROS PASOS [Fácil]/go
    
    the code of the file until where you have to start completion: package main

import (
	"fmt"
	"strconv"
)

/* Hola mundo*/ 

func main(){
  fmt.Println("Hello World!!")
}

/* Tipos de datos */ 
var message string ="Hola como estas?"
var micr
    
  func ControlError(){
    var price string = "124"
    // convertir variable a entero
    num,err:=strconv.Atoi(price)
    
    // hacer algo en caso de error 
    if err!=nil{
      panic(err)
    }
    fmt.Println(num)
  }