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package main
import (
func main() {
const BufferSize = 100
file, err := os.Open("filetoread.txt")
if err != nil {
defer file.Close()
buffer := make([]byte, BufferSize)
for {
bytesread, err := file.Read(buffer)
// err value can be io.EOF, which means that we reached the end of
// file, and we have to terminate the loop. Note the fmt.Println lines
// will get executed for the last chunk because the io.EOF gets
// returned from the Read function only on the *next* iteration, and
// the bytes returned will be 0 on that read.
if err != nil {
if err != io.EOF {
fmt.Println("bytes read: ", bytesread)
fmt.Println("bytestream to string: ", string(buffer[:bytesread]))