How do I create goroutines in Go?

How do I create goroutines in Go?

To create a goroutine in Go, you simply use the go keyword followed by a function call. For example: go myFunction().

Can you give me an example of using goroutines?

Sure! Here's a simple example:

package main
import (
    "fmt"
    "time"
)

func printMessage(message string) {
    fmt.Println(message)
}

func main() {
    go printMessage("Hello from goroutine!")
    time.Sleep(1 * time.Second) // Wait for goroutine to finish
}

What happens if I don't use time.Sleep?

If you don't use time.Sleep, the main function may exit before the goroutine has a chance to run, causing it to be terminated prematurely.

How can I wait for multiple goroutines to finish?

You can use a sync.WaitGroup to wait for multiple goroutines to finish. Here's an example:

package main
import (
    "fmt"
    "sync"
)

func printMessage(wg *sync.WaitGroup, message string) {
    defer wg.Done() // Notify that this goroutine is done
    fmt.Println(message)
}

func main() {
    var wg sync.WaitGroup
    messages := []string{"Hello 1", "Hello 2", "Hello 3"}

    for _, msg := range messages {
        wg.Add(1) // Increment the WaitGroup counter
        go printMessage(&wg, msg)
    }

    wg.Wait() // Wait for all goroutines to finish
}