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== History of PascalABC.NET ==
PascalABC.NET was developed by a group of enthusiasts at the Institute of Mathematics, Mechanics, and Computer Science in Rostov-on-Don, Russia.<ref name=":1">{{Cite book |last=Osipov |first=Alexander V. |title=PascalABC.NET: Vvedenie v sovremennoe programmirovanie [PascalABC.NET: Introduction to Modern Programming] |publisher= |year=2019 |___location=Rostov-on-Don, Russia |pages=28 |language=ru-RU}}</ref> In 2003, a predecessor of the modern PascalABC.NET, called Pascal ABC, was implemented by associate professor Stanislav Mikhalkovich to be used for teaching schoolchildren instead of [[Turbo Pascal]], which became outdated and incompatible with modern operating systems but was still used for educational purposes. Pascal ABC was implemented as an [[Interpreter (computing)|interpreted programming language]], that led to a significant lack of performance. Four years after that it was completely rewritten by students Ivan Bondarev, Alexander Tkachuk, and Sergey Ivanov as a [[Compiled language|compiled programming language]] for the .NET platform. In 2009, PascalABC.NET started to be actively used for teaching high school students. By 2015, the number of users of the language had increased significantly. It began to be actively used throughout Russia in schools and at programming contests, surpassing [[Free Pascal|FreePascal]]. Since then, the PascalABC.NET developers have set themselves the goal of actively incorporating modern features into the language. In the same year, PascalABC.NET became an open source project distributed under the [[GNU Lesser General Public License|LGPLv3 license]].<ref>{{Cite web |date=2021-03-30 |title=Twisted Pair Podcast, #389 |url=https://tpair.org/podcast/tp-389/ |website=Twisted Pair Podcast |language=ru-RU}}</ref><ref>{{Cite web |
In 2017<ref>{{Cite web |date=2017-03-29 |title=Analysis of PascalABC.NET using SonarQube plugins: SonarC# and PVS-Studio |url=https://pvs-studio.com/en/blog/posts/csharp/0492/ |website=PVS-Studio |lang=en}}</ref> and 2022,<ref>{{Cite web |date=2022-02-11 |title=Re-checking PascalABC.NET |url=https://medium.com/pvs-studio/re-checking-pascalabc-net-f8bfc94aba3c |website=Medium |lang=en}}</ref> independent audit of [https://github.com/pascalabcnet/pascalabcnet PascalABC.NET public repository] was conducted. Based on the results of the static check, potentially dangerous code fragments were listed that require additional analysis by developers. It was also noted that the overall quality of the code could be improved. To do this, code duplication and redundant checks should be eliminated, and refactoring should be performed more carefully.
== Use in school and higher education ==
Designed for education, PascalABC.NET remains the most common programming language in Russian schools and one of the recommended languages for passing the [[Unified State Exam]] on informatics.<ref>{{Cite web |title=Metodicheskie rekomendacii po podgotovke i provedeniyu edinogo gosudarstvennogo ekzamena po informatike i IKT v komp'yuternoj forme v gorode Moskve v 2021 godu [Guidelines for the preparation and conduct of the unified state exam in computer science and ICT in the city of Moscow in 2021] |url=http://rcoi.mcko.ru/resources/upload/RichFilemanager/documents/2020-2021/org_metod/11/mr_kege_inf_2021.pdf |publisher=Departament obrazovaniya i nauki goroda Moskvy [Department of Education and Science of Moscow] |page=110 |language=ru-RU |access-date=5 April 2023 |archive-date=28 January 2022 |archive-url=https://web.archive.org/web/20220128150316/http://rcoi.mcko.ru/resources/upload/RichFilemanager/documents/2020-2021/org_metod/11/mr_kege_inf_2021.pdf |url-status=dead }}</ref><ref name=":4">{{Cite web |last=Polyakov |first=Konstantin |title=Doklady na konferenciyah i seminarah [Reports at conferences and seminars] |url=https://kpolyakov.spb.ru/school/doklad.htm |language=ru-RU}}</ref><ref name=":3">{{Cite web |last=Bogdanov |first=Alexey |date=2022-10-04 |title=PascalABC.Net or Python/ C#/C++ |url=https://www.youtube.com/watch?v=RulhCYnbRAA |access-date=2023-04-05 |website=YouTube |language=ru-RU}}</ref> In the Southern Federal University, it is used as the first language for teaching students majoring in computer science, and for teaching children in one of the largest computer schools in Russia.<ref>{{Cite news |last=Popova |first=Ekaterina |date=2022-09-06 |title=Kak v Rostove gumanitarii uspeshno obuchayutsya IT-special'nostyam [How humanitarians successfully study IT specialties in Rostov] |language=ru-RU |work=Komsomolskaya Pravda |url=https://www.rostov.kp.ru/daily/27441/4643617/}}</ref> PascalABC.NET is widely used as a basic programming language in pedagogical universities for the training of computer science teachers.<ref name="MathAnim">{{Cite journal |last1=Dzhenzher |first1=V.O. |last2=Denisova |first2=L.V. |year=2019 |title=Mathematical animation in computer simulation at school |url=https://www.sciencegate.app/document/10.32517/2221-1993-2019-18-6-51-54 |journal=Informatics in School |language=ru-RU |issue=6 |pages=51–54 |doi=10.32517/2221-1993-2019-18-6-51-54 |s2cid=203704481}}</ref><ref name="HammingCode">{{Cite journal |last1=Dzhenzher |first1=V.O. |last2=Denisova |first2=L.V. |year=2021 |title=Implementation of the Hamming code on PascalABC.NET while studying the theoretical foundations of informatics
In 2020, during anti-COVID lockdowns and home schooling period, PascalABC.NET website was ranked 3<sup>rd</sup> in Yandex traffic rating in the "Programming" category, and the number of downloads of the installation kit exceeded 10000 a day.<ref>{{Cite web |last=Kubysheva |first=Olga |date=2020-04-17 |title=PascalABC.NET: Sajt sistemy programmirovaniya, razrabatyvaemoj na mekhmate YUFU, podnyalsya v rejtinge YAndeksa na tret'e mesto [PascalABC.NET: Site of programming system developed at SFedU MMCS faculty climbed up to the third place in Yandex ranking] |url=https://www.rostov.kp.ru/online/news/3839814/ |website=Komsomol'skaya pravda |language=ru-RU}}</ref>
Though the core of the PascalABC.NET community is located in Russia, the language is also known in other countries such as Belarus,<ref>{{Cite journal |last=Kutysh |first=Aleksandr Z. |year=2018 |title=Razrabotka soderzhaniya vzaimosvyazannogo obucheniya budushchih uchitelej informatiki tekhnologiyam programmirovaniya [Development of interconnected training content for future computer science teachers in programming] |url=https://www.adu.by/images/2019/05/PedNauka_3(24)_2018.pdf |journal=Pedagogical
== Language syntax ==
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Println(m); // [[1,2,3,4],[2,3,4,5],[3,4,5,6]]
Println(m[:2,1:3]); // [[2,3],[3,4]]
</syntaxhighlight>Some other features such as inline variable declarations, type inference, and <code>for</code> statement with a variable declaration are standard in the current version of Delphi. However, PascalABC.NET pioneered these features in 2007,<ref name=":2">{{Cite web |title=PascalABC.NET. What's New |url=https://pascalabc.net/chto-novogo
==== Changed features ====
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=== Functional style features ===
In PascalABC.NET, functions are [[First-class citizen|first-class objects]]. They can be assigned to variables, passed as parameters, and returned from other functions. Functional type is set in the form <code>T -> Res</code>.<ref>{{Cite book |last=Osipov |first=Alexander V. |title=PascalABC.NET: Vvedenie v sovremennoe programmirovanie [PascalABC.NET: Introduction to Modern Programming] |year=2019 |___location=Rostov-on-Don, Russia |pages=
<syntaxhighlight lang="delphi">
## // denotes that the main program will be written without enclosing begin-end
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== Criticism ==
Though PascalABC.NET is actively used for teacher training,<ref name=":4" /><ref name="MathAnim" /><ref>{{Cite journal |
== References ==
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