SketchyLISP Reference |
Copyright (C) 2007 Nils M Holm |
<<[natural] | [Index] | [ndivide]>> |
Conformance: SketchyLISP Core
Purpose: Test whether a number is a natural number or zero.
Implementation:
(define natural? non-negative?)
Example:
(natural? 567) => #t
See also:
digits,
natural,
integer?.
<<[natural] | [Index] | [ndivide]>> |