Identity function

Identity function - function that always returns the same value that was used as its argument. Article “Identity function” in English Wikipedia has 28.3 points for quality (as of July 1, 2026). The article contains 11 references and 5 sections.

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

Since the creation of article “Identity function”, its content was written by 87 registered users of English Wikipedia and edited by 615 registered Wikipedia users in all languages.

The article is cited 378 times in English Wikipedia and cited 2646 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #431 in February 2002
• Global: #562 in February 2002

The highest popularity rank from 2008:

• Local (English): #115677 in October 2010
• Global: #76567 in November 2012

There are 36 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	Turkish (tr) Birim fonksiyon		32.6512
2	Greek (el) Ταυτοτική συνάρτηση		32.4591
3	English (en) Identity function		28.288
4	Persian (fa) تابع همانی		26.7668
5	Romanian (ro) Identitate (matematică)		24.2101
6	Estonian (et) Samasusteisendus		23.5475
7	Portuguese (pt) Função identidade		22.8382
8	Vietnamese (vi) Hàm đồng nhất		21.0606
9	Arabic (ar) دالة مطابقة		19.8044
10	Polish (pl) Funkcja tożsamościowa		18.4853

More...

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

The most popular language versions of the article "Identity function" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Identity function		1 201 954
2	Spanish (es) Función identidad		807 643
3	German (de) Identische Abbildung		298 607
4	French (fr) Application identité		174 059
5	Japanese (ja) 恒等写像		138 115
6	Persian (fa) تابع همانی		117 308
7	Portuguese (pt) Função identidade		115 819
8	Turkish (tr) Birim fonksiyon		112 689
9	Polish (pl) Funkcja tożsamościowa		108 041
10	Italian (it) Funzione identità		98 903

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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 "Identity function" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Identity function		3 078
2	German (de) Identische Abbildung		238
3	Persian (fa) تابع همانی		215
4	Japanese (ja) 恒等写像		210
5	Chinese (zh) 恆等函數		200
6	Russian (ru) Тождественное отображение		178
7	Spanish (es) Función identidad		160
8	French (fr) Application identité		158
9	Polish (pl) Funkcja tożsamościowa		72
10	Portuguese (pt) Função identidade		71

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

Language versions of the article "Identity function" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Identity function		87
2	French (fr) Application identité		56
3	German (de) Identische Abbildung		52
4	Italian (it) Funzione identità		39
5	Russian (ru) Тождественное отображение		34
6	Dutch (nl) Identieke afbeelding		32
7	Spanish (es) Función identidad		28
8	Turkish (tr) Birim fonksiyon		28
9	Danish (da) Identitetsfunktion		25
10	Persian (fa) تابع همانی		23

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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 "Identity function" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Arabic (ar) دالة مطابقة		1
2	Thai (th) ฟังก์ชันเอกลักษณ์		1
3	Catalan (ca) Funció identitat		0
4	Czech (cs) Identita (matematika)		0
5	Danish (da) Identitetsfunktion		0
6	German (de) Identische Abbildung		0
7	Greek (el) Ταυτοτική συνάρτηση		0
8	English (en) Identity function		0
9	Esperanto (eo) Identa funkcio		0
10	Spanish (es) Función identidad		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 "Identity function" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	English (en) Identity function		378
2	Polish (pl) Funkcja tożsamościowa		285
3	Korean (ko) 항등 함수		219
4	German (de) Identische Abbildung		200
5	French (fr) Application identité		185
6	Japanese (ja) 恒等写像		175
7	Portuguese (pt) Função identidade		121
8	Spanish (es) Función identidad		115
9	Chinese (zh) 恆等函數		102
10	Italian (it) Funzione identità		87

More...

#	Language	Value
ar	Arabic دالة مطابقة
ca	Catalan Funció identitat
cs	Czech Identita (matematika)
da	Danish Identitetsfunktion
de	German Identische Abbildung
el	Greek Ταυτοτική συνάρτηση
en	English Identity function
eo	Esperanto Identa funkcio
es	Spanish Función identidad
et	Estonian Samasusteisendus
eu	Basque Identitate funtzio
fa	Persian تابع همانی
fi	Finnish Identiteettifunktio
fr	French Application identité
gl	Galician Función identidade
he	Hebrew פונקציית הזהות
hi	Hindi तत्समक फलन
hr	Croatian Funkcija identiteta
id	Indonesian Fungsi identitas
it	Italian Funzione identità
ja	Japanese 恒等写像
ko	Korean 항등 함수
nl	Dutch Identieke afbeelding
pl	Polish Funkcja tożsamościowa
pt	Portuguese Função identidade
ro	Romanian Identitate (matematică)
ru	Russian Тождественное отображение
simple	Simple English Identity function
sl	Slovenian Identična funkcija
sv	Swedish Identitetsfunktion
ta	Tamil முற்றொருமைச் சார்பு
th	Thai ฟังก์ชันเอกลักษณ์
tr	Turkish Birim fonksiyon
uk	Ukrainian Тотожне відображення
vi	Vietnamese Hàm đồng nhất
zh	Chinese 恆等函數

Best Rank

English: #115677 10.2010

Global: #76567 11.2012

Best Rank

English: #431 02.2002

Global: #562 02.2002

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