Error Handling

Go doesn’t use exceptions. Instead, functions that can fail return an error as their last value, and you check it right away. This is the famous if err != nil idiom:

result, err := doRisky()
if err != nil {
    fmt.Println("it failed:", err)
    return
}
// safe to use result here

A nil error means success. You create errors with errors.New("message") or fmt.Errorf("got %d", n).

##Your Quest

drink(0) returns an error. Check err: if it’s not nil, print the error; otherwise print Potion drunk!.

Expected output:

no potions left

##Hint

if err != nil { fmt.Println(err) } else { fmt.Println("Potion drunk!") }.

##Additional Scrolls of Wisdom

• Joining Errors with errors.Join in Go
• Go Panic and Recovery Tutorial