İ

"Dotted I" redirects here. For the Cyrillic letter, see Dotted I (Cyrillic).

"I-dot" redirects here. For the state agency, see Illinois Department of Transportation.

Not to be confused with i or ¡.

İ, or i, called dotted I or i-dot, is a letter used in the Latin-script alphabets of Azerbaijani, Crimean Tatar, Gagauz, Kazakh, Tatar, and Turkish. It commonly represents the close front unrounded vowel /i/ except in Kazakh in which it additionally represents the voiced palatal approximant /j/ and the diphthongs /ɪj/ and /əj/. All languages that use it also use its dotless counterpart I, but not the basic Latin letter I.

I with dot above
İ i
Usage
Writing system	Latin script
Type	alphabetic
Language of origin	Azerbaijani language, Crimean Tatar language, Turkish language
Sound values	[i] [j] [ɪj] [əj]
In Unicode	U+0130, U+0069
History
Development	Ιι 𐌉 I i İ i
Time period	1928 to present
Sisters	I ı
Other
Writing direction	Left-to-Right
This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets and transcription delimiters.

In computing

Main article: Dotted and dotless I in computing

The dotted I is encoded into Unicode with the code point U+0130 (U+0069 for the lowercase letter) as part of the Latin Extended-A block.^[1]

Character information

Preview	İ		i
Unicode name	LATIN CAPITAL LETTER I WITH DOT ABOVE		LATIN SMALL LETTER I
Encodings	decimal	hex	dec	hex
Unicode	304	U+0130	105	U+0069
UTF-8	196 176	C4 B0	105	69
Numeric character reference	İ	İ	i	i
Named character reference	İ
ISO 8859-9	221	DD	105	69
ISO 8859-3	169	A9	105	69

Issues

The dotted and dotless I characters have caused issues in computing. Languages like Turkish have four variants of the letter I (as opposed to two in English). This causes problems when, instead of the original mapping of i to I, Turkish maps i to the new İ, and ı to I, frequently breaking software logic.^[2]

Usage in other languages

Both the dotted and dotless I can be used in transcriptions of Rusyn to allow distinguishing between the letters Ы and И, which would otherwise be both transcribed as "y", despite representing different phonemes. Under such transcription the dotted İ would represent the Cyrillic І, and the dotless I would represent either Ы or И, with the other being represented by "Y".^{[citation needed]}

See also

• Dotless I, the letter's dotless counterpart
• Tittle – Diacritical mark, the dot of the letters i and j