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I is the 9th letter in the Latin alphabet.
History
The letter I derived from the Greek iota (Ι, ι). It stood for the vowel /i/, the same as in the Etruscan alphabet. In Latin (as in Modern Greek) /j/ (as English Y in YOKE) was added. In Semitic, /j/ was the usual sound value of Jôd (probably originally a pictogram for an arm with hand), /i/ only in foreign words.
In English, I represents different sounds, among them a diphthong that developed from /i:/ as well as short, open /I/ as in BILL. The dot over the lowercase 'i' is called a tittle. In the Turkish alphabet, dotted and dotless I are considered separate letters and both have uppercase (I, İ) and lowercase (ı, i) forms.
Alternate representations
India represents the letter I in the NATO phonetic alphabet.
In international Morse code the letter I is DitDit: · ·
In Braille the letter I is represented as ⠊ (in Unicode), the dot pattern,
.X
X.
..
Computing
In Unicode the capital I is codepoint U+0049 and the lowercase i is U+0069.
The ASCII code for capital D is 68 and for lowercase d is 100; or in binary 01001001 and 01101001, correspondingly.
The EBCDIC code for capital I is 201 and for lowercase i is 137.
The numeric character references in HTML and XML are "I" and "i" for upper and lower case respectively.
Meanings for I
- In biochemistry, I is the symbol for isoleucine.
- In chemistry, I is the symbol for iodine.
- In computing,
<i> is the HTML tag for marking italic type. It is also commonly used as the name of the index variable in for loops when no other name suggests itself.
- In English, I is a pronoun denoting the first person, singular.
- In film, I is the name of a Swedish film made in 1966. See I (film).
- In international licence plate codes, I stands for Italy.
- In mathematics,
- In music, I is the name of the winner of the Norwegian version of Pop Idol and also World Idol, Kurt Nilsen's debut album. See I (album).
- In physics and electronic engineering, I is often the variable for electric current. The imaginary unit is represented by j instead.
- In radiocommunication, I is the ITU prefix allocated to Italy.
- In Roman numerals, I denotes the number one.
- In structural engineering I is used for the moment of inertia
See also
Ì, Í, Î, Ï, Ĭ, İ
Two-letter combinations starting with I:
af:I ca:I cs:I da:I de:I el:I eo:I es:I fr:I gl:I it:I ia:I ja:I la:I nl:I pl:I pt:I ro:I sl:I sv:I vi:I zh:I
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