I

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I
ISO basic Latin alphabet
AaBbCcDdEeFfGg
HhIiJjKkLlMmNn
OoPpQqRrSsTtUu
VvWwXxYyZz
 
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I
ISO basic Latin alphabet
AaBbCcDdEeFfGg
HhIiJjKkLlMmNn
OoPpQqRrSsTtUu
VvWwXxYyZz
Cursive.svg
Circle sheer blue 29.gif
Circle sheer blue 31.gif
Cursive script 'i' and capital 'I'

The letter I is a vowel and used in most words. The lowercase I is dotted and the uppercase I has a line on both ends. I (named i /ˈ/, plural ies)[1] is the ninth letter and a vowel in the ISO basic Latin alphabet.

History[edit]

Egyptian hieroglyph Phoenician
Yodh
Etruscan
I
Greek
Iota
D36
PhoenicianI-01.svgEtruscanI-01.svgIota uc lc.svg

In Semitic, the letter may have originated in a hieroglyph for an arm that represented a voiced pharyngeal fricative (/ʕ/) in Egyptian, but was reassigned to /j/ (as in English "yes") by Semites, because their word for "arm" began with that sound. This letter could also be used to represent /i/, the close front unrounded vowel, mainly in foreign words.

The Greeks adopted a form of this Phoenician yodh as their letter iota (Ι, ι) to represent /i/, the same as in the Old Italic alphabet. In Latin (as in Modern Greek), it was also used to represent /j/ and this use persists in the languages that descended from Latin. The modern letter 'j' was firstly 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.

In modern English, 'i' represents several different sounds, either a "long" diphthong /aɪ/ as in kite, which developed from Middle English /iː/ after the Great Vowel Shift of the 15th century, or the "short" /ɪ/ as in bill.

Use in English[edit]

In English orthography, the letter 'i' has a "long" and "short" sound like the other vowel letters as a result of the Great Vowel Shift: "long" 'i' has the sound // and "short" 'i' has the sound /ɪ/. The letter 'i' may also take the sound // in loanwords from other languages. Some digraphs that include 'i' are ai, oi, ei, ui and ie.

The letter 'i' is the fifth most common letter in the English language.

Use in other languages[edit]

In many languages' orthographies, 'i' is used to represent the sound /i/ or more rarely, /ɪ/.

Other Usage[edit]

It is also used in mathematics to denote the imaginary unit i.

Forms and variants[edit]

In some san 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 has generally a hooked ascender and a baseline serif.

The uppercase I does not have a dot (tittle) while the lowercase i has one in the most of Latin alphabets. However, some schemes, such as the Turkish alphabet, have two kinds of I's: the dotted one (İi) and the dotless one (Iı).

The uppercase I has two kinds of shapes, which are one with crossbars (I with crossbars.svg) and without crossbars (I without crossbars.svg). Usually, they are considered the same, but they are distinguished in some extended Latin alphabet systems such as the 1978 version of the African reference alphabet. In the system, the former is the uppercase counterpart of ɪ and the latter is the counterpart of 'i'.

Computing codes[edit]

CharacterIi
Unicode nameLATIN CAPITAL LETTER I    LATIN SMALL LETTER I
Encodingsdecimalhexdecimalhex
Unicode73U+0049105U+0069
UTF-8734910569
Numeric character referenceIIii
EBCDIC family201C913789
ASCII 1734910569
1 Also for encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings.

Other representations[edit]

NATO phoneticMorse code
India··
ICS India.svgSemaphore India.svg⠊
Signal flagFlag semaphoreBraille
dots-24

Related letters and other similar characters[edit]

See also[edit]

References[edit]

  1. ^ Brown & Kiddle (1870) The institutes of English grammar, p. 19.
    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.

External links[edit]


AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz
Letter I with diacritics
Í íÌ ìĬ ĭÎ îǏ ǐÏïḮḯĨĩĮ įĪ īỈ ỉȈ ȉȊ ȋỊ ịḬ ḭƗ ɨİ iI ı
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