I, or i, is the ninth letter and the third vowel letter of the modern English alphabet and the ISO basic Latin alphabet.Not counting marginal use of 'h' to write vowel sounds.
Its name in English is i (pronounced ), plural ies.Brown & Kiddle (1870) The institutes of English grammar, p. 19. <br>Ies is the plural of the English name of the letter; the plural of the letter itself is rendered I's, Is, i's, or is.
History
In the Phoenician alphabet, the letter may have originated in a hieroglyph for an arm that represented a voiced pharyngeal fricative () in Egyptian, but was reassigned to  (as in English "yes") by Semites, because their word for "arm" began with that sound.
This letter could also be used to represent , the close front unrounded vowel, mainly in foreign words.
The Greeks adopted a form of this Phoenician yodh as their letter iota () to represent , the same as in the Old Italic alphabet.
In Latin (as in Modern Greek), it was also used to represent  and this use persists in the languages     that descended from Latin.
The modern letter 'j' originated as a variation of 'i', and both were used interchangeably for both the vowel and the consonant, coming to be differentiated only in the 16th century.
The dot over the lowercase 'i' is sometimes called a tittle.
In the Turkish alphabet, dotted and dotless I are considered separate letters, representing a front and back vowel, respectively, and both have uppercase ('I', 'İ') and lowercase ('ı', 'i') forms.
Use in writing systems
English
In Modern English spelling,  represents several different sounds, either the diphthong  ("long" ) as in kite, the short  as in bill, or the  sound  in the last syllable of machine.
The diphthong  developed from Middle English  through a series of vowel shifts.
In the Great Vowel Shift, Middle English  changed to Early Modern English , which later changed to  and finally to the Modern English diphthong  in General American and Received Pronunciation.
Because the diphthong  developed from a Middle English long vowel, it is called "long"  in traditional English grammar.
The letter  is the fifth most common letter in the English language.
The English first-person singular nominative pronoun is "I", pronounced   and always written with a capital letter.
This pattern arose for basically the same reason that lowercase  acquired a dot: so it wouldn't get lost in manuscripts before the age of printing:
Other languages
thumb|Pronunciation of the name of the letter  in European languages|305x305px|left
In many languages' orthographies,  is used to represent the sound  or, more rarely, .
Other uses
The Roman numeral I represents the number 1.
In mathematics, a lowercase "" is used to represent the unit imaginary number, while an uppercase "" serves to denote an identity matrix.
Forms and variants
In some sans serif typefaces, the uppercase letter I, 'I' may be difficult to distinguish from the lowercase letter L, 'l', the vertical bar character '|', or the digit one '1'.
In serifed typefaces, the capital form of the letter has both a baseline and a cap-height serif, while the lowercase L generally has a hooked ascender and a baseline serif.
The uppercase I does not have a dot (tittle) while the lowercase i has one in most Latin-derived alphabets.
However, some schemes, such as the Turkish alphabet, have two kinds of I: dotted (İi) and dotless (Iı).
The uppercase I has two kinds of shapes, with serifs (x15px) and without serifs (x15px).
Usually these are considered equivalent, but they are distinguished in some extended Latin alphabet systems, such as the 1978 version of the African reference alphabet.
In that system, the former is the uppercase counterpart of ɪ and the latter is the counterpart of 'i'.
Computing codes
1Also for encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings
Other representations
Related characters
Descendants and related characters in the Latin alphabet
I with diacritics: Ị ị Ĭ ĭ Î î Ǐ ǐ Ɨ ɨ Ï ï Ḯ ḯ Í í Ì ì Ȉ ȉ Į į Į́ Į̃ Ī ī Ī̀ ī̀  ᶖ Ỉ ỉ Ȋ ȋ Ĩ ĩ Ḭ ḭ ᶤ
İ i and I ı : Latin dotted and dotless letter i i̇̀ i̇́ i̇̃ į̇́ į̇̃
IPA-specific symbols related to I:
The Uralic Phonetic Alphabet uses various forms of the letter I:
Other variations used in phonetic transcription: ᵻ ᶤ  ᶦ ᶧ
i : Superscript small i is used for Computer terminal graphics
Ꞽ ꞽ : Glottal I, used for Egyptological yod
Ɪ ɪ : Small capital I
ꟾ : Long I
ꟷ : Sideways I
Ancestors and siblings in other alphabets
: Semitic letter Yodh, from which the following symbols originally derive
Ι ι: Greek letter Iota, from which the following letters derive
: Coptic letter Yota
І і : Cyrillic letter soft-dotted I
𐌉 : Old Italic I, which is the ancestor of modern Latin I
: Runic letter isaz, which probably derives from old Italic I
: Gothic letter iiz
See also
Tittle
References
External links
