Covered by EXCLAMATION-MARK•HYPHEN-MINUS.md

2022-03-27 11:03:57 -07:00
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 --------------------
 ## !-
 "not negative"
 (Function, Boolean Predicate)
 Integer on top of stack is replaced by Boolean value indicating whether
 it is non-negative.
        N !-
    -----------  N < 0
       false
       N !-
    ----------  N >= 0
       true
 ### Definition
    0 >=