β
Composition Operator Symbol (β)
Copy the Composition Operator symbol β to your clipboard, and see its Unicode code point, HTML entity, LaTeX command and how to type it on any device.
What does β mean?
The ring operator β denotes function composition: (f β g)(x) = f(g(x)). It is also used for the degree sign in some typesetting. Its official Unicode name is RING OPERATOR.
Codes and properties
| Character | β |
|---|---|
| Unicode name | RING OPERATOR |
| Code point | U+2218 |
| Decimal | 8728 |
| Unicode block | Mathematical Operators |
| HTML entity | ∘ Β· ∘ |
| CSS | \2218 |
| JavaScript / JSON | \u2218 |
| Python | \u2218 or \N{RING OPERATOR} |
| UTF-8 bytes | E2 88 98 |
| LaTeX | \circ |
How to type β
- Copy & paste: press the Copy button above, then paste β anywhere β Word, Google Docs, email, chat or code.
- Windows (Word, WordPad, Outlook): type
2218then press Alt+X. In any app, Win+. opens the symbol panel. - Mac: switch to the Unicode Hex Input keyboard, hold Option and type
2218; or press Ctrl+Cmd+Space and search βring operatorβ. - Linux (GTK/IBus): press Ctrl+Shift+U, type
2218, then Space. - HTML:
∘renders as β. - LaTeX:
\circin math mode (amssymb package for some symbols).
Frequently asked questions
How do I type β on Windows?
In Microsoft Word type 2218 and press Alt+X. In any app press Win+. to open the symbol panel, or copy β from this page.
What is the HTML code for β?
Use ∘ (hex) or ∘ (decimal).
What is the LaTeX command for β?
Use \circ in math mode.