Golang : Read file

This is the most basic way of how to read a file into buffer and display its content chunk by chunk. This example read plain text file, if you are reading a binary file... change fmt.Println(string(buffer[:n])) to fmt.Println(buffer[:n]) (without the string).

For now, this is the most basic example of reading a file in Go

 package main

  import (

  func main() {

 file, err := os.Open("sometextfile.txt")

 if err != nil {

 defer file.Close()

 // create a buffer to keep chunks that are read

 buffer := make([]byte, 1024)
 for {
 // read a chunk
 n, err := file.Read(buffer)
 if err != nil && err != io.EOF { panic(err) }
 if n == 0 { break }

 // out the file content


  See also : Golang : How to read CSV file

By Adam Ng

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