Concurrency in Go: Go routines example - 2

gistfile1.txt

package main

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

func main() {
	var wg sync.WaitGroup
	wg.Add(1) // increments WaitGroup counter

	go func(){
		counter("first")
		wg.Done() // decrements WaitGroup counter
	}()
	wg.Wait() // waits for the counter to be zero to continiou
}

func counter(rank string) {
	for i := 1; i <= 7; i++ {
		fmt.Println(i, rank)
		time.Sleep(time.Second * 1)
	}
}