Go Systems Programming

Waiting for goroutines to finish their jobs

This subsection will demonstrate to you the correct way to make a calling function that wait for its goroutines to finish their jobs. The name of the program will be waitGR.go and will be presented in four parts; the first part is the following:

package main 
 
import ( 
   "fmt" 
   "sync" 
) 

There is nothing special here apart from the absence of the time package and the addition of the sync package.

The second part has the following Go code:

func main() { 
   fmt.Println("Waiting for Goroutines!") 
 
   var waitGroup sync.WaitGroup 
   waitGroup.Add(10) 

Here, you create a new variable with a type of sync.WaitGroup, which waits for a group of goroutines to finish. The number of goroutines that belong to that group is ...