Quiz · Goroutines and channels · lesson 10 of 13
Quiz — a counter under a Mutex
What does the program print?
package main
import "fmt"
import "sync"
func main() {
var wg, mu, n = sync.WaitGroup{}, sync.Mutex{}, 0
wg.Go(func() { mu.Lock(); n++; mu.Unlock() })
wg.Go(func() { mu.Lock(); n++; mu.Unlock() })
wg.Wait()
fmt.Println(n)
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