Goroutines iterator using WaitGroup

goroutine_iterator.go

package main

import (
	"fmt"
	"sync"
	"time"
)

func main() {
	var ch chan int
	var wg sync.WaitGroup

	ch = make(chan int)
	routines := [100]int{}

	wg.Add(len(routines))

	for i := 0; i < len(routines); i++ {
		go func(i int) {
			defer wg.Done()
			ch <- i
		}(i)
	}

	go func(ch chan int) {
		for {
			if ch, ok := <-ch; ok {
				fmt.Println(ch)
				time.Sleep(time.Second)
			}
		}
	}(ch)

	wg.Wait()
}