Go by Example: Channel Synchronization

We can use channels to synchronize execution across goroutines. Here’s an example of using a blocking receive to wait for a goroutine to finish. When waiting for multiple goroutines to finish, you may prefer to use a WaitGroup.
	package main
	import "fmt" import "time"
This is the function we’ll run in a goroutine. The `done` channel will be used to notify another goroutine that this function’s work is done.	func worker(done chan bool) { fmt.Print("working...") time.Sleep(time.Second) fmt.Println("done")
Send a value to notify that we’re done.	done <- true }
	func main() {
Start a worker goroutine, giving it the channel to notify on.	done := make(chan bool, 1) go worker(done)
Block until we receive a notification from the worker on the channel.	<-done }

	$ go run channel-synchronization.go working...done
If you removed the `<- done` line from this program, the program would exit before the `worker` even started.