---
name: "Prelude.Maybe"
section: "3kaya"
platform: "linux"
package: "kaya"
version: "0.4.4-6.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/Prelude.Maybe"
---

# Prelude.Maybe(3kaya)

Optional values.

## NAME

Prelude::Maybe - Optional values.

## SYNOPSIS

**Prelude::Maybe\<** *a* **\>**

-

  \=  **nothing(****)**

-

  \|  **just(***a val***)**

## DESCRIPTION

A value is either of type **a**  , represented as **just(a)**  , or empty. Maybe is often useful for computations which can possibly fail, for example looking up values in a dictionary. Because the **nothing**  value can be stored, this is often more useful than Exceptions on failure.

## AUTHORS

Kaya standard library by Edwin Brady, Chris Morris and others (kaya@kayalang.org). For further information see http://kayalang.org/

## LICENSE

The Kaya standard library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License (version 2.1 or any later version) as published by the Free Software Foundation.

## RELATED

**Prelude.deref (3kaya)**

**Dict.lookup (3kaya)**