Double-struck Capital C Letter
ℂ is a double-struck capital C symbol (U+2102) used for stylized math and formal typography.
U+2102
ℂ, also called Double-Struck Capital C, is a decorative stylized character. It’s commonly used in mathematical and design contexts where a “blackboard bold”-style letter looks appropriate. You can copy it directly or use its Unicode/HTML codes.
Double-struck Capital C Letter Meaning
ℂ (Unicode U+2102) is the “double-struck capital C” character. In many contexts, it’s used as a stylized C, often resembling blackboard bold lettering. The most common meaning users associate it with is the notation for the complex numbers, especially in math texts and formulas. Outside of mathematics, it can function simply as a typographic accent—an eye-catching capital C with a distinct double-stroke look. Because it’s a Unicode character with a specific code point, it’s best used directly (copy/paste) or via its HTML/CSS/JS escapes to ensure consistent rendering across platforms.
Common uses
- •Typing the complex numbers symbol in math notes, homework, and study materials
- •Designing mathematical posters, slides, or infographics with consistent typographic styling
- •Labeling diagrams or axes that refer to complex values or complex domains
- •Creating stylized headings or brand-like typography using a double-stroke C
- •Writing educational content where you want a formal math-looking character
Examples
ℂ Double-Struck Capital C (U+2102)
- ℂLet z ∈ ℂ be a complex number.
- ℂDefine f: ℂ → ℂ.
- ℂThe solution set is a subset of ℂ.
- ℂWe study holomorphic functions on ℂ.
- ℂChoose a point in ℂ and plot its behavior.
Variations
Technical codes
| Unicode | U+2102 | |
| HTML Entity | ℂ | |
| HTML Code | ℂ | |
| CSS | \2102 | |
| Alt Code | Alt + 8450 | |
| Decimal | 8450 |
How to type Double-struck Capital C Letter (ℂ)
On Windows
Hold Alt and type 8450 on the numeric keypad. In Word, type 2102 then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 2102. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 2102, then press Enter or Space.
Anywhere
Copy ℂ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What does the Double-struck Capital C letter mean?
ℂ (Unicode U+2102) is the “double-struck capital C” character. In many contexts, it’s used as a stylized C, often resembling blackboard bold lettering. The most common meaning users associate it with is the notation for the complex numbers, especially in math texts and formulas. Outside of mathematics, it can function simply as a typographic accent—an eye-catching capital C with a distinct double-stroke look. Because it’s a Unicode character with a specific code point, it’s best used directly (copy/paste) or via its HTML/CSS/JS escapes to ensure consistent rendering across platforms.
What is the Unicode code point for ℂ?
ℂ is Unicode U+2102, named DOUBLE-STRUCK CAPITAL C.
How can I copy ℂ into my work?
Copy the character ℂ directly from this page, or use the provided escapes: HTML ℂ or CSS \\2102.
Does ℂ always mean complex numbers?
Most commonly it’s used in math for the complex numbers, but it can also be used as a stylized double-stroke capital C in typography.
Will ℂ display the same in every browser?
It depends on font support. Using Unicode U+2102 and an appropriate math or Unicode-capable font improves consistency, but exact appearance may vary.