How to Handle Multiple Errors in Go

Go handles multiple errors by returning them as a single error value, often using errors.Join to combine them or by returning the first error encountered. To aggregate multiple errors without stopping execution, use errors.Join to combine them into one error that can be unpacked later.

import "errors"

var errs []error

// Collect errors
if err := doSomething(); err != nil {
    errs = append(errs, err)
}
if err := doSomethingElse(); err != nil {
    errs = append(errs, err)
}

// Combine into a single error
if len(errs) > 0 {
    return errors.Join(errs...)
}
return nil

In Simple Terms: This approach lets you run several tasks and collect all failures instead of stopping at the first one. Think of it like a checklist where you mark every mistake found, then hand in the whole list at the end rather than quitting after the first error. This ensures you see the full picture of what went wrong.

Go handles multiple errors by collecting them into a single error value instead of stopping immediately. You can use the errors.Join function to combine several errors into one, allowing your program to continue running and report all issues at once. This is like a safety inspector noting every defect in a building rather than leaving after finding the first one.