| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |
This constant has the value of IEEE double-float NaN (Not-a-Number). It is a legal floating-point value. In arithmetic operations, it produces itself in all cases. See the linked discussion for more details.
NaNs like this one can result from normal arithmetic operations, such
zero divided by zero in a function with types declared and compiled so
comp:trust-declarations-switch
is true,
but that same call run interpreted may instead signal an error.
See Floating-point infinities and NaNs, and
floating-point underflow and overflow in
implementation.htm. Also see
*negative-infinity-single*
,
*infinity-double*
,
*infinity-single*
,
*negative-infinity-double*
, and
*nan-single*
Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 8.1 page.
Created 2010.1.21.
| Allegro CL version 8.2 Unrevised from 8.1 to 8.2. 8.1 version |