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| ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers
12.2.30 evenp, oddp | Function
  Syntax: evenp integer generalized-boolean oddp integer generalized-boolean Arguments and Values: integer - an integer. generalized-boolean - a generalized boolean. Description: evenp returns true if integer is even (divisible by two); otherwise, returns false. oddp returns true if integer is odd (not divisible by two); otherwise, returns false. Examples:
       (evenp 0)  true
       (oddp 10000000000000000000000)  false
       (oddp -1)  true
  Exceptional Situations: Should signal an error of type type-error if integer is not an integer. Notes:
       (evenp integer) ==(not (oddp integer))
       (oddp integer)  ==(not (evenp integer))
Allegro CL Implementation Details: None.

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