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GNU APL (view source)

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GNU APL is a free and (almost) complete implementation of Extended APL as specified in [[ISO/IEC 13751:2001]] and is thus similar to [[APL2]]. It runs on GNU/Linux and on Windows using Cygwin, and uses Unicode internally. GNU APL was written and is being maintained by [[Jürgen Sauermann|GNU APL community]].
{{Infobox array language
| array model              = [[nested array model|nested]]
| index origin            = 0 or 1
| function styles          = [[tradfn]], [[dfn]] (limited)
| numeric types            = [[complex]] floats, rational
| unicode support          = full
| released                = 2013
| developer                = Jürgen Sauermann, [[GNU APL community]]
| latest release version  = 1.8 / 2019
| implementation language  = [[wikipedia:C++|C++]]
| source                  = [http://svn.savannah.gnu.org/viewvc/apl/trunk/ GNU Savannah]
| platforms                = x86, x86_64
| operating systems        = Linux, Windows (via Cygwin)
| license                  = [[wikipedia:GNU_General_Public_License|GNU GPL]]
| website                  = [https://www.gnu.org/software/apl/ gnu.org/software/apl]
| download                = [https://ftp.gnu.org/gnu/apl/ .deb, .rpm]
| file ext                = .apl
| documentation            = [https://www.gnu.org/software/apl/apl.html info manual]
| influenced by           = [[APL2]], [[Dyalog APL]]
| run online              = [http://juergen-sauermann.de/try-GNU-APL try-GNU-APL]
}}
{| class=wikitable style="float:right;max-width:33%"
|{{quote | "Both 32-and 64-bit GNU APL are available for Windows, truly proving G_d is great! الله أكبر"|Alan G. Konheim. [https://sites.cs.ucsb.edu/~konheim/Feistel%20Talk%20-2Final.pdf ''Creativity in Computer Science – Horst Feistel'']. Footnote 14. Page F-9.}}
|}


GNU APL interpreter includes:
'''GNU APL''' is a free and (almost) complete implementation of Extended APL as specified in [[ISO/IEC 13751:2001]] and is thus similar to [[APL2]]. It was initially written and is being maintained by Jürgen Sauermann. It includes extensions such as [[complex number]]s and a shared variable interface.


* nested arrays and related functions
[[File:GNU APL.png|thumb|left|GNU APL's online demo, [http://juergen-sauermann.de/try-GNU-APL try-GNU-APL]]]
* complex numbers, and
In addition to a normal local APL [[session]], GNU APL can used in a "scripting" language fashion by processing linear scripts passed to the interpreter at startup. There is an experimental online version as well as the ability to be compiled into a shared loadable library for embedding the interpreter into other projects.
* a shared variable interface


In addition, GNU APL can be scripted.
Documents on GNU APL sometimes quote [[Richard Stallman]], who both founded GNU and programmed in APL. However, Stallman is not directly associated with the project.
 
== Encoding ==
Richard Stallman, founder of the GNU Project, had been an early adopter of APL, using it to write a text editor as a high school student in the summer of 1969.
 
As of recently, there is an (experimental) online version of GNU APL.


GNU APL tends to prefer the [[Unicode]] ''Lozenge'' (U+25CA; <syntaxhighlight lang=apl inline>◊</syntaxhighlight>) and ''Element of'' (U+2208; <syntaxhighlight lang=apl inline>∈</syntaxhighlight>) over ''Diamond operator'' (U+22C4; <syntaxhighlight lang=apl inline>⋄</syntaxhighlight>) and ''Small Element of'' (U+220A; <syntaxhighlight lang=apl inline>∊</syntaxhighlight>) which are more commonly used by other dialects. This can lead to [[SYNTAX ERROR]]s if attempting to use code written for GNU APL in other implementations. However, GNU APL also accepts the more common code points.
== External links ==
== External links ==


* [http://juergen-sauermann.de/try-GNU-APL Try GNU APL online]
* [http://www.gnu.org/software/apl The GNU APL Homepage]
* [https://www.gnu.org/software/apl/ Website]
* [http://lists.gnu.org/archive/html/bug-apl/ The GNU APL Mailing List]
 
* [http://www.gnu.org/software/apl/apl.html The GNU APL Info Manual]
{{APL programming language}}
* [http://svn.savannah.gnu.org/viewvc/apl/ GNU APL Sources (Subversion)]
* [https://savannah.gnu.org/svn/?group=apl Help for GNU APL Subversion]
* [http://www.gnu.org/software/apl/Community.html The GNU APL Community]
{{APL dialects}}[[Category:APL dialects]][[Category:Nested array languages]]
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