closing-channels-start.go

// There's no "channel broadcast" in Go, i.e. you can't send something to multiple goroutines using the same channel. However you can close the channel and all goroutines will be notified.

package main

import (
	"fmt"
	"time"
)

func printer(msg string, goCh chan bool) {
	<-goCh

	fmt.Printf("%s\n", msg)
}

func main() {
	goCh := make(chan bool)

	for i := 0; i < 10; i++ {
		go printer(fmt.Sprintf("printer: %d", i), goCh)
	}

	time.Sleep(time.Second * 2)
	close(goCh)
	time.Sleep(time.Second * 2)
}