Side effect (computer science)

Side effect - additional effect of a function in a procedural programming language besides returning a value. Article “Side effect (computer science)” in English Wikipedia has 21.3 points for quality (as of July 1, 2026). The article contains 6 references and 6 sections.

This article has the best quality in German Wikipedia. However, this article is the most popular in English version.

Since the creation of article “Side effect (computer science)”, its content was written by 102 registered users of English Wikipedia and edited by 445 registered Wikipedia users in all languages.

The article is cited 148 times in English Wikipedia and cited 585 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #1280 in January 2002
• Global: #1409 in January 2002

The highest popularity rank from 2008:

• Local (English): #127807 in April 2015
• Global: #134443 in April 2015

There are 22 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	German (de) Wirkung (Informatik)		29.6864
2	Simple English (simple) Side effect (computer science)		22.4124
3	English (en) Side effect (computer science)		21.3445
4	Ukrainian (uk) Побічний ефект (програмування)		18.5093
5	Persian (fa) اثر جانبی (علوم رایانه)		15.2267
6	Serbian (sr) Пропратни ефекти		14.1437
7	Arabic (ar) تأثير جانبي (علم الحاسوب)		13.3847
8	Chinese (zh) 副作用 (计算机科学)		12.2468
9	Japanese (ja) 副作用 (プログラム)		11.7352
10	Russian (ru) Побочный эффект (программирование)		10.3344

More...

The following table shows the most popular language versions of the article.

The most popular language versions of the article "Side effect (computer science)" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Side effect (computer science)		1 122 860
2	French (fr) Effet de bord (informatique)		251 491
3	Russian (ru) Побочный эффект (программирование)		181 205
4	German (de) Wirkung (Informatik)		122 836
5	Japanese (ja) 副作用 (プログラム)		118 462
6	Spanish (es) Efecto secundario (informática)		62 149
7	Chinese (zh) 副作用 (计算机科学)		56 623
8	Polish (pl) Skutek uboczny (informatyka)		44 556
9	Italian (it) Effetto collaterale (informatica)		31 586
10	Korean (ko) 부작용 (컴퓨터 과학)		15 854

More...

The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Side effect (computer science)" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Side effect (computer science)		2 979
2	French (fr) Effet de bord (informatique)		420
3	Japanese (ja) 副作用 (プログラム)		223
4	Russian (ru) Побочный эффект (программирование)		221
5	Chinese (zh) 副作用 (计算机科学)		187
6	German (de) Wirkung (Informatik)		149
7	Persian (fa) اثر جانبی (علوم رایانه)		35
8	Spanish (es) Efecto secundario (informática)		33
9	Italian (it) Effetto collaterale (informatica)		32
10	Polish (pl) Skutek uboczny (informatyka)		30

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The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Side effect (computer science)" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Side effect (computer science)		102
2	German (de) Wirkung (Informatik)		66
3	French (fr) Effet de bord (informatique)		49
4	Italian (it) Effetto collaterale (informatica)		34
5	Russian (ru) Побочный эффект (программирование)		27
6	Chinese (zh) 副作用 (计算机科学)		25
7	Japanese (ja) 副作用 (プログラム)		19
8	Polish (pl) Skutek uboczny (informatyka)		19
9	Czech (cs) Vedlejší účinek (programování)		14
10	Korean (ko) 부작용 (컴퓨터 과학)		13

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The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Side effect (computer science)" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Arabic (ar) تأثير جانبي (علم الحاسوب)		0
2	Azerbaijani (az) Yan təsir (proqramlaşdırma)		0
3	Czech (cs) Vedlejší účinek (programování)		0
4	German (de) Wirkung (Informatik)		0
5	Greek (el) Παρενέργεια (υπολογιστές)		0
6	English (en) Side effect (computer science)		0
7	Esperanto (eo) Kromefiko (programada)		0
8	Spanish (es) Efecto secundario (informática)		0
9	Persian (fa) اثر جانبی (علوم رایانه)		0
10	French (fr) Effet de bord (informatique)		0

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The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Side effect (computer science)" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Side effect (computer science)		148
2	French (fr) Effet de bord (informatique)		84
3	Japanese (ja) 副作用 (プログラム)		50
4	Russian (ru) Побочный эффект (программирование)		42
5	German (de) Wirkung (Informatik)		34
6	Ukrainian (uk) Побічний ефект (програмування)		29
7	Chinese (zh) 副作用 (计算机科学)		29
8	Korean (ko) 부작용 (컴퓨터 과학)		28
9	Italian (it) Effetto collaterale (informatica)		25
10	Spanish (es) Efecto secundario (informática)		23

More...

#	Language	Value
ar	Arabic تأثير جانبي (علم الحاسوب)
az	Azerbaijani Yan təsir (proqramlaşdırma)
cs	Czech Vedlejší účinek (programování)
de	German Wirkung (Informatik)
el	Greek Παρενέργεια (υπολογιστές)
en	English Side effect (computer science)
eo	Esperanto Kromefiko (programada)
es	Spanish Efecto secundario (informática)
fa	Persian اثر جانبی (علوم رایانه)
fr	French Effet de bord (informatique)
it	Italian Effetto collaterale (informatica)
ja	Japanese 副作用 (プログラム)
ko	Korean 부작용 (컴퓨터 과학)
nl	Dutch Neveneffect
pl	Polish Skutek uboczny (informatyka)
ru	Russian Побочный эффект (программирование)
simple	Simple English Side effect (computer science)
sr	Serbian Пропратни ефекти
sv	Swedish Sidoeffekt (datorprogrammering)
uk	Ukrainian Побічний ефект (програмування)
vi	Vietnamese Hiệu ứng lề (khoa học máy tính)
zh	Chinese 副作用 (计算机科学)

Best Rank

English: #127807 04.2015

Global: #134443 04.2015

Best Rank

English: #1280 01.2002

Global: #1409 01.2002

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In English Wikipedia the most popular articles on that day were: 2026 FIFA World Cup, Harry Kane, Julián Quiñones, List of FIFA World Cup top goalscorers, Kylian Mbappé, Democratic Republic of the Congo, Erling Haaland, DR Congo national football team, Melat Kiros, FIFA World Cup.

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information