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SketchyLISP
Reference
  Copyright (C) 2007
Nils M Holm

non-negative?

Conformance: SketchyLISP Core

Purpose: Check whether a number is positive or zero.

Arguments:
X - number

Implementation:

(define (non-negative? x)
  (eq? (negative? x) #f))

Example:

(non-negative? 0) 
=> #t

See also:
digits, negative?, zero?, abs.