How do I handle errors in Go when using goroutines?

How do I handle errors in Go when using goroutines?

In Go, you can handle errors in goroutines by returning the error from the goroutine and using channels to communicate.

Can you show me a code example of that?

Sure! Here's a simple example:

package main

import (
    "fmt"
    "time"
)

func doWork(ch chan<- error) {
    // Simulate work
    time.Sleep(1 * time.Second)
    // Return an error
    ch <- fmt.Errorf("an error occurred")
}

func main() {
    ch := make(chan error)
    go doWork(ch)
    err := <-ch
    if err != nil {
        fmt.Println("Error:", err)
    }
}

What if I have multiple goroutines?

You can use a sync.WaitGroup to wait for multiple goroutines to finish and collect their errors in a slice.