I, I is the ninth letter in the Latin alphabet. It comes from the Greek letters ι ι, ι(Iota). It stands for the sound value /I/, just like the Etruscan alphabet. In Latin (including contemporary Latin), there is also the meaning of /j/ (such as Y in English Yoke). In semitic, /j/ is j? 0? The common pronunciations in 0d and /I/ are only used for loanwords. In English, it means different pronunciations, including long sounds and short sounds.

In the Turkish alphabet, there is a small "? 0? "2" is different from "I" and "I"? 0? "3" is two different letters.

In the NATO phonetic alphabet, I stands for India, or less commonly, Indigo.

Capital I stands for

In chemistry, a chemical symbol representing elemental iodine.

In physics, it means:

electric current

rotary inertia

In optics, representing an image.

Use Roman numerals to represent 1.

Represents the pronoun "I" in English.

The lowercase I stands for

In mathematics, it means:

Imaginary number () in complex number. The square of I is-1

Unit vector in x coordinate direction

In electricity, it means current.

In computer science, I is the most commonly used name for loop control variables.

other

In Hong Kong slang, "II" means "illegal immigrant".