test.go

package main

import (
	"fmt";
)

func worker (i int, c chan bool) () {
	fmt.Printf("%d\n", i);
	c <- true;
}

func main () {
	c := make(chan bool);

	for i := 0; i < 100; i++ {
		go worker(i, c);
	}

	for i := 0; i < 100; i++ {
		<-c;
	}
	fmt.Printf("Drained\n");
}