Count words frequency reading standard input with go

Hi guys,
today is day 8 out of 100 days of code.

The task for today is to count words frequency reading data from stdin.  Input is scanned using bufio *Scanner with a split by words(ScanWords).
Lets see the code:

package main

import (

func main() {
	//map to store words frequency
	words := make(map[string]int)
	//we will read from file
	in := bufio.NewReader(os.Stdin)
	scanner := bufio.NewScanner(in)
	//we ask scanner to split input by words for us
	count := 0
	//scan the inpurt
	for scanner.Scan() {
		//get input token - in our case a word and update it's frequence
	if err := scanner.Err(); err != nil {
		fmt.Fprintln(os.Stderr, "reading input:", err)
	fmt.Printf("Total words: %d\n", count)
	fmt.Printf("Words frequency: \n")
	//todo: sort words by values for nice print
	for k, v := range words {
		fmt.Printf("%s:%d\n", k, v)

Results are stored in a map words. The property of map that it doesn’t have defined order of keys, so the bonus here is to sort words map by frequency of words(by values).

See source code at GitHub