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| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version

## exceptional-floating-point-number-p

Arguments: object

Returns true if object is a floating-point infinity or nan. Returns `nil` otherwise.

The actual value when true should not be depended upon, beyond its not being `nil`. The actual value may change in a new release or in an update without notice.

See also nanp and infinityp and the section on Floating-point infinities and NaNs, and floating-point underflow and overflow in implementation.htm.

Copyright (c) 1998-2022, Franz Inc. Lafayette, CA., USA. All rights reserved.
This page was not revised from the 10.0 page.
Created 2019.8.20.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 10.1 Unrevised from 10.0 to 10.1. 10.0 version