golang goroutine with waitgroup

Waitgroup provides a simple and easy to use approach to managing go routines. A basic example can be shown here.

package main

import (

    "fmt"

    "sync"

)

func worker(id int, w *sync.WaitGroup) {

    defer w.Done()

    fmt.Printf("Worker: %d processing tasks \n", id)

}

func main() {

    var wg sync.WaitGroup

    const numTask = 2

    // starting our worker

    for i := 0; i < numTask; i++ {

        wg.Add(1)

        fmt.Printf("firing task %d \n", i)

        go worker(i, &wg)

    }

    wg.Wait()

    fmt.Println("Done")

}