channel_types.go

func main() {
	var wg sync.WaitGroup
	channel := make(chan string)

	wg.Add(2)
	go sendToChannel(channel, &wg)
	go receiveFromChannel(channel, &wg)

	wg.Wait()
}

func sendToChannel(ch chan<- string, wg *sync.WaitGroup) {
	defer wg.Done()
	ch <- "Sending a message to the channel"
}

func receiveFromChannel(ch <-chan string, wg *sync.WaitGroup) {
	defer wg.Done()
	fmt.Println(<-ch)
}