Double Struck Capital C
U+2102DOUBLE-STRUCK CAPITAL CLetterlike Symbols
Also known as complex numbers symbolset of complex numbers
Copy and paste ℂ. The Double Struck Capital C character has Unicode code point U+2102 and decimal HTML code ℂ.
Symbol codes
- Unicode
U+2102- HTML Code
ℂ- CSS Code
\2102- HTML Entity
ℂ- HEX Code
ℂ
Technical properties
Unicode 18.0.0
- Code point
- U+2102
- Decimal
- 8450
- Unicode name
- DOUBLE-STRUCK CAPITAL C
- Block
- Letterlike Symbols · U+2100–U+214F
- General category
- Uppercase Letter (Lu)
- Script
- Common
- Introduced
- Unicode 1.1
- JavaScript
- "\u2102"
Appears in
About Double Struck Capital C
ℂ is encoded in Unicode as code point U+2102 (decimal 8450). Its official Unicode name is DOUBLE-STRUCK CAPITAL C.
It belongs to the Letterlike Symbols block (U+2100–U+214F), its General Category is Uppercase Letter (Lu), and it was added in Unicode 1.1, released in 1993. Its script value is Common: it is shared across writing systems rather than belonging to one.
Sources: Unicode Character Database 18.0.0, the HTML Standard’s list of named character references, and Unicode’s code page mappings.
How to type or insert Double Struck Capital C
- Any device
- Select Copy symbol, then paste with Ctrl+V, or ⌘+V on a Mac.
- Microsoft Word
- Type
2102, then press Alt+X. - macOS Character Viewer
- Press Control+⌘+Space and search for “double-struck capital c”.
- Linux (GTK and IBus)
- Press Ctrl+Shift+U, type
2102, then press Space. - HTML
ℂorℂ. In a UTF-8 page you can also paste the character itself.- CSS
content: "\2102";in a::beforeor::afterrule.- JavaScript
"\u2102"
Common questions about Double Struck Capital C
What is the Double Struck Capital C symbol?
ℂ (Double Struck Capital C) is an uppercase letter in Unicode’s Letterlike Symbols block. Its code point is U+2102, and it has been part of the standard since Unicode 1.1 (1993). It is also known as complex numbers symbol and set of complex numbers.
How do I copy and paste the Double Struck Capital C symbol?
Select Copy symbol at the top of this page, then paste with Ctrl+V on Windows and Linux or ⌘+V on a Mac. On a phone, tap Copy symbol, then touch and hold where you want it and choose Paste. ℂ pastes as ordinary text, so it works in documents, messages, and code.
How do I type the Double Struck Capital C symbol on Windows?
In Microsoft Word, type 2102 and press Alt+X to turn the code into ℂ. In any app, open Character Map from the Start menu, search for “double-struck capital c”, then select and copy the character.
How do I type the Double Struck Capital C symbol on a Mac?
Press Control+⌘+Space to open the Character Viewer, search for “double-struck capital c”, and double-click the result to insert it.
How do I type the Double Struck Capital C symbol on an iPhone or Android phone?
The simplest way is to copy it from this page and paste it where you need it. If you use it often, save it as a text shortcut: on iPhone, go to Settings > General > Keyboard > Text Replacement; with Gboard on Android, go to Gboard settings > Dictionary > Personal dictionary.
Can I use the Double Struck Capital C symbol in Word, Google Docs, and social media?
Yes. ℂ is a standard Unicode character, so you can paste it into Microsoft Word, Google Docs, emails, and posts or bios on Instagram, X, Facebook, and TikTok. In Google Docs you can also choose Insert > Special characters and search for “double-struck capital c”. In Word, choose Insert > Symbol > More Symbols, set from to Unicode (hex), and enter 2102 as the character code.
Is the Double Struck Capital C symbol an emoji?
No. ℂ is a text symbol, not an emoji. It takes the color and size of the surrounding text, and its exact shape depends on the font.
Why does the Double Struck Capital C symbol show as a box or question mark?
An empty box or a question mark means the font on that device has no glyph for ℂ. The character is still there: it appears correctly wherever a font covers Unicode’s Letterlike Symbols block, and free font families such as Google Noto cover nearly all of Unicode.
What are the HTML and CSS codes for the Double Struck Capital C symbol?
In HTML, write ℂ (decimal) or ℂ (hexadecimal), or the named entity ℂ. In CSS, use content: "\2102"; in a ::before or ::after rule, and in JavaScript "\u2102". See all HTML codes.