How do I handle errors in goroutines?

How do I handle errors in goroutines?

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

Can you show me an example of that?

Sure! You can create a channel to send errors back to the main function. Here's a simple example:

package main

import (
    "fmt"
    "time"
)

func doWork(ch chan error) {
    // Simulate work
    time.Sleep(1 * time.Second)
    // Simulate 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 wait group to wait for all goroutines to finish and a slice of errors to collect any errors that occur.