Latin Small Letter I

i
Symbol Format Data
i Code Point
U+0069
TeX
i
i SVG
Symbol Table

Usage

The Latin letter is used in mathematics to define complex numbers, where represents the square root of negative one. The symbol is also used in computing and linear algebra as an index variable.

Related

capital i

The capital Latin letter I is used in math to represent the identity matrix.

Links

Complex Numbers

Complex numbers are an extension of the real number system with useful properties that model two dimensional space and trigonometry.

Variable

A variable is a core concept in algebra where a symbol, usualy a lower case latin letter, is used as a placeholder in a math expression.