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

## fixnump

Arguments: x

Returns `t` if the argument is a fixnum and returns `nil` otherwise.

    cl-user(2): (fixnump 1)  ;; 1 is a fixnum is any Common Lisp
    t
    cl-user(3): (fixnump most-positive-fixnum) ;; defined to be a fixnum
    t
    cl-user(4): (fixnump (1+ most-positive-fixnum))
      ;; defined not to be a fixnum
    nil
    cl-user(5): (fixnump 1.0) ;; floats are not fixnums
    nil
    cl-user(6): (fixnump t) ;; works (returning NIL) for
                            ;; values that are not numbers
    nil
    cl-user(7):

See also single-float-p and double-float-p.

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