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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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