Channels allow us to easily handle a scenario in which multiple consumers receive data from one producer and vice versa.

The case with a single producer and one consumer, as we have already seen, is pretty straightforward:

func main() {
    // one producer
    var ch = make(chan int)
    go func() {
        for i := 0; i < 100; i++ {
            ch <- i
        }
        close(ch)
    }()
    // one consumer
    var done = make(chan struct{})
    go func() {
        for i := range ch {
            fmt.Println(i)
        }
        close(done)
    }()
    <-done
}

The full example is available here: https://play.golang.org/p/hNgehu62kjv.