base-4.7.0.0: Basic libraries

Copyright	(c) The University of Glasgow 2001
License	(c) The University of Glasgow 2001
Maintainer	libraries@haskell.org
Stability	experimental
Portability	portable
Safe Haskell	Trustworthy

Data.Bool

Contents

Booleans
- Operations

Description

The Bool type and related functions.

Synopsis

Booleans

data Bool Source

Constructors

False
True

Instances

Bounded Bool
Enum Bool
Eq Bool
Data Bool
Ord Bool
Read Bool
Show Bool
Ix Bool
Generic Bool
Typeable Bool
Storable Bool
Typeable * Bool

Operations

(&&) :: Bool -> Bool -> Bool Source

Boolean "and"

(||) :: Bool -> Bool -> Bool Source

Boolean "or"

not :: Bool -> Bool Source

Boolean "not"

otherwise :: Bool Source

otherwise is defined as the value True. It helps to make guards more readable. eg.

  f x | x < 0     = ...
      | otherwise = ...