test.go

package main

import (
	"time"
	"fmt"
)

func main() {

	fmt.Print("hello!")

	stat := make(chan int , 20)

	for i:=0 ; i < 20 ; i++ {
		go func(i int, c chan int ) {
			fmt.Printf("Hello from %s\n", i)
			time.Sleep( 2 *  time.Second)
			c <- i
		}(i, stat)
	}


	for f := range stat {
		fmt.Printf("go a hit %s\n", f)
		if f >= 19 {
			close(stat)
		}
	}

	fmt.Print(" --- done --- \n")
}