Why Does My Goroutine Remain Idle When the Main Program Exits?

Understanding Goroutine Execution: Why My Goroutine Remained Idle

In your Go code, you sought to experiment with goroutines and channels. The goal was to create a goroutine that continuously reads from a channel, but the expected "Entering the goroutine..." message never appeared. This article explores the reasons behind this behavior.

The code you provided includes a goroutine created as follows:

go func(m *chan string) {
    fmt.Println("Entering the goroutine...")
    for {
        fmt.Println(<- *m)
    }
}(&amp;messages)

Though the goroutine is launched, it quickly terminates because the main program concludes immediately after printing "Done!". Goroutines execute concurrently with the main program; however, they will terminate when the main program exits.

To prevent the goroutine from being prematurely terminated, you need to find a way to keep the main program running while the goroutine is executing. This can be achieved by employing a separate channel that waits for a specific number of messages, using a sync.WaitGroup, or implementing other techniques.

The Go blog offers an extensive guide to concurrency (https://blog.golang.org/go-proverbs) that provides valuable insights into how concurrency works in Go.

The above is the detailed content of Why Does My Goroutine Remain Idle When the Main Program Exits?. For more information, please follow other related articles on the PHP Chinese website!