# Capital C Symbol

The capital Latin letter C is used in mathematics to represent the set of complex numbers usually with a "double-struck" typeface. It also appears in geometric formulas as a variable representing the circumference of a circle.

Format Display Data
TeX
C
Unicode C
67


## Usage

Circumference of Circle | Formula

The circumference of a circle is given by two multiplied by pi and the radius.

Set of Complex Numbers | Notation

The set of complex numbers is denoted using the Latin capital letter C most often presented with a double-struck typeface.