Golang : Read file with ioutil

This tutorial will show you how to read a file into buffer and display the content in Go. This example read plain text file, if you are reading a binary file... change fmt.Println(string(file)) to fmt.Println(file) (without the string).

Reading binary file will be more tricky as you need to know the format before reading the file. It will be covered in another tutorial.

For now, this is the most basic example of reading a file in Go with io/ioutil

readfileioutil.go

 package main

  import (
 "fmt"
 "io/ioutil"
  )

  func main() {

 file, err := ioutil.ReadFile("testfile.txt")

 if err != nil {
 fmt.Println(err)
 return
 }


 // out the file content
 fmt.Println(string(file))

 }