16. Concurrent Work

Activity 16.01: Listing Numbers

Solution:

1. Create the main.go file and import the necessary packages:

   package main
   import (
       "fmt"
       "log"
       "sync"
   )

2. Define a function called sum(), which will use a pointer to a string to hold the result:

   func sum(from,to int, wg *sync.WaitGroup, res *string, mtx *sync.Mutex) {
       for i:=from;i<=to; i++ {
           mtx.Lock()
           *res = fmt.Sprintf("%s|%d|",*res, i)
           mtx.Unlock()
       }
       wg.Done()
       return
   }

3. Create then the main() function to perform the sums:

   func main() {
       s1 := ""
       mtx := &sync.Mutex{}
       wg := &amp...