From: Eli Zaretskii <eliz@gnu.org>
Date: Sat, 8 Sep 2001 17:42:52 +0000 (+0000)
Subject: (Integer Basics): Document CL style read syntax for
X-Git-Tag: emacs-pretest-21.0.106~189
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=d9940cbfd1b3b0fd20e5372125f8805c9b967981;p=emacs.git

(Integer Basics): Document CL style read syntax for
integers in bases other than 10.
---

diff --git a/lispref/numbers.texi b/lispref/numbers.texi
index b9ab94cfc81..9689d5cedfe 100644
--- a/lispref/numbers.texi
+++ b/lispref/numbers.texi
@@ -67,6 +67,18 @@ initial sign and optional final period.
 -0               ; @r{The integer 0.}
 @end example
 
+@cindex integers in specific radix
+@cindex radix for reading an integer
+@cindex base for reading an integer
+  In addition, the Lisp reader recognizes a syntax for integers in
+bases other than 10: @samp{#B@var{integer}} reads @var{integer} in
+binary (radix 2), @samp{#O@var{integer}} reads @var{integer} in octal
+(radix 8), @samp{#X@var{integer}} reads @var{integer} in hexadecimal
+(radix 16), and @samp{#@var{radix}r@var{integer}} reads @var{integer}
+in radix @var{radix} (where @var{radix} is between 2 and 36,
+inclusivley).  Case is not significant for the letter after @samp{#}
+(@samp{B}, @samp{O}, etc.) that denotes the radix.
+
   To understand how various functions work on integers, especially the
 bitwise operators (@pxref{Bitwise Operations}), it is often helpful to
 view the numbers in their binary form.