Go dual channels

channels.go

package main

import (
	"fmt"
)

func printch(ch1, ch2, q chan int) {
	for {
		select {
		case x := <-ch1:
			fmt.Print(x)
		case y := <-ch2:
			fmt.Print(y)
		case <-q:
			fmt.Println("quiting..")
			return
		}
		fmt.Println()
	}
}
func main() {
	var ch1, ch2, q = make(chan int), make(chan int), make(chan int)
	go func() {
		for i := 0; i < 10; i++ {
			ch2 <- i * i
			ch1 <- i
		}
		q <- 0
	}()
	printch(ch1, ch2, q)
}