Example of using Channels in Go

channels.go

package main

import (
	"log"
	"time"
)

// Sends messages over the channel
func sender(ch chan<- string) {
	for i := range 5 {
		if i < 4 {
			ch <- "Tick!"
		} else {
			ch <- "BOOM!"
		}

		// Wait a bit until next message is sent
		time.Sleep(500 * time.Millisecond)
	}
}

// Receives messages over the channel
func receiver(ch <-chan string) {
	// Iterate over the channel over time and print the received messages
	for msg := range ch {
		log.Println(msg)
	}
}

func main() {
	// Create a channel
	ch := make(chan string)
	done := make(chan bool)

	// Spawn a goroutine for the message receiver
	go receiver(ch)

	// Spawn a goroutine for the message sender
	go func() {
		// Send messages to the channel
		sender(ch)

		// Always close the channel when it's no longer required
		close(ch)

		// Send done signal
		done <- true
	}()

	// Wait for the done signal
	<-done
}