Explain error handling in Go.

Error handling in Go: • Errors are values, not exceptions • Functions return error as last return value • Check errors explicitly • Use panic/recover for exceptional cases • Custom error types possible Example: func divide(a, b float64) (float64, error) { if b == 0 { return 0, errors.New("division by zero") } return a / b, nil } result, err := divide(10, 0) if err != nil { log.Fatal(err) }