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ANSI Common Lisp 12 Numbers 12.2 Dictionary of Numbers
12.2.17 minusp, plusp |
Function |
- Syntax:
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minusp
real
generalized-boolean
plusp
real
generalized-boolean
- Arguments and Values:
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real - a real.
generalized-boolean - a generalized boolean.
- Description:
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minusp returns true if real is less than zero; otherwise, returns false.
plusp returns true if real is greater than zero; otherwise, returns false.
Regardless of whether an implementation provides distinct
representations for positive and negative float zeros,
(minusp -0.0) always returns false.
- Examples:
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(minusp -1) true
(plusp 0) false
(plusp least-positive-single-float) true
- Exceptional Situations:
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Should signal an error of type type-error if real is not a real.
- Allegro CL Implementation Details:
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None.
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