Closing a channel

closechannel.go

package main

import (
	"fmt"
	"time"
)

const (
	iterations = 5
	sleepTime  = 500 * time.Millisecond
)

func main() {
	channel := make(chan int)
	go doIt(channel)
	for {
		i, closed := <-channel // get channel and if it's closed
		if !closed {
			break
		}
		fmt.Printf("iteration = %d\n", i)
	}
}

func doIt(channel chan int) {
	for i := 0; i < iterations; i++ {
		channel <- i
		time.Sleep(sleepTime)
	}
	close(channel) // close the channel
}