Using "close" to stop multiple goroutines

allstop.go

package main

import (
        "fmt"
        "sync"
)

func main() {
        wg := new(sync.WaitGroup)
        stop := make(chan bool)
        data := make(chan int)

        for i := 0; i < 10; i++ {
                wg.Add(1)
                go func(id int) {
                        defer wg.Done()
                        for {
                                select {
                                case <-stop:
                                        return
                                case data <- id:
                                }
                        }
                }(i)
        }

        for i := 0; i < 50; i++ {
                fmt.Println(<-data)
        }
        close(stop)

        wg.Wait()
}