counts words passed from stdio in go, learning script

commands_for_windows.cmd

taskkill /F /IM counter.exe /T 2>$null

del /F counter.exe

go build -o counter.exe counter.go

echo yeah baby | counter.exe
2

counter.go

// package main identifies this file as an executable program rather than a library.
package main

import (
	"bufio" // Provides buffered I/O to read input efficiently.
	"fmt"   // Implements formatted I/O, used here for printing the result.
	"os"    // Provides a platform-independent interface to operating system functionality.
)

func main() {
	// Initialize a new scanner that reads from Standard Input.
	s := bufio.NewScanner(os.Stdin)

	// Instruct the scanner to split input into words (whitespace-delimited).
	// By default, a scanner splits by lines (\n).
	s.Split(bufio.ScanWords)

	// c acts as our word accumulator.
	c := 0

	// s.Scan() advances to the next word. It returns true if a token was found
	// and false if the input is exhausted or an error occurred.
	for s.Scan() {
		c++
	}

	// Print the final count followed by a newline.
	fmt.Println(c)
	
	// Implementation Note: In a production environment, one should 
	// call s.Err() after the loop to check for read errors (e.g., token too long).
}