DigitP

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Data Structure Primitives

Predicates

CSymP

GraphP

DigitP achar
Digit? achar


outputs true if the input is a character in the subset of numerical digit characters.

Examples:

digit? "a ;false ;-) digit? "A ;false ;-) digit? "1 ;true ;-) digit? 1 ;false ;-) digit? "ü ;true ;-) <= this seems to be a bug!!! digit? "! ;false ;-) digit? char 13 ;false ;-)

CSymP

GraphP