ℂ

Complex Numbers Symbol (ℂ)

Copy and paste the complex numbers ℂ with one click

Unicode Character

ℂ

Unicode Hex

U+2102

HTML Entity

ℂ

Decimal Code

8450

About the Complex Numbers Symbol

Last reviewed on October 31, 2026

ℂ is a double-struck C for the complex numbers, those of the form a + bi. Algebra and engineering notes write z ∈ ℂ. The set contains the real numbers as the case where b = 0.

Its official Unicode name is Double-Struck Capital C. Browse the Mathematical Symbols page for related characters.

How to Type Complex Numbers on a Keyboard

Windows: Type 2102 then press Alt+X in Word; in other apps, copy ℂ from this page and paste it. It has no classic Alt code

Mac: Press Ctrl+Cmd+Space to open the Character Viewer, then search for the symbol by name

Microsoft Word: Type 2102 then press Alt+X

Phone & tablet: Copying ℂ from this page is fastest — see our mobile typing guide

Complex Numbers Code for HTML, CSS & JavaScript

HTML: ℂ

CSS: content: '\2102';

JavaScript: '\u2102'

Unicode: U+2102

Frequently Asked Questions

How do I type complex numbers ℂ on Windows?

Type 2102 then press Alt+X in Word; in other apps, copy ℂ from this page and paste it. It has no classic Alt code. You can also copy ℂ straight from this page.

How do I type ℂ on a Mac?

Press Ctrl+Cmd+Space to open the Character Viewer, then search for the symbol by name.

What is the Unicode and HTML code for complex numbers?

It is Unicode code point U+2102, named Double-Struck Capital C. In HTML, use ℂ.