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## *negative-infinity-double*

This constant has the value of IEEE negative double-float infinity. It is a legal floating-point value. In arithmetic operations, it produces double-float infinities of appropriate sign or NaNs, but a finite number (in fact zero) only when divided into a finite number. See the linked discussion for more details.

Infinities like this one can result from normal arithmetic operations, such as a division 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*`, `*nan-double*`, and `*nan-single*`

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This page was not revised from the 8.2 page.
Created 2012.5.30.

|  | ToC | DocOverview | CGDoc | RelNotes | FAQ | Index | PermutedIndex
| Allegro CL version 9.0 Unrevised from 8.2 to 9.0. 8.2 version