1.1. Primitive Types
Description of Letlang's builtin types
The class is named boolean
and contains the values true
and false
:
true is boolean; # true
false is boolean; # true
The classes are named int
and number
. The class number
contains all the
numerical values, while the class int
only contains the ones with a fractional
part equal to 0
:
42 is number; # true
42 is int; # true
2.3 is number; # true
2.3 is int; # false
Every Letlang number or integer is a 64-bits float (see IEEE-754 specification).
The class string
contains all the UTF-8 character strings:
"hello world" is string; # true
Atoms are user-defined symbols, starting with the character @
. The class
atom
contains all such values:
@ok is atom;
@hello is atom;
Every letlang value can be used as a type which contains only that specific value:
42 is 42; # true
42 is "hello"; # false