# ∘ U+2218 RING OPERATOR

Small hollow circle operator used for function composition, as in f of g, also called the APL jot.

| | |
|---|---|
| Character | `∘` |
| Codepoint | U+2218 |
| Name | RING OPERATOR |
| Also known as | APL jot, composite function |
| Block | [Mathematical Operators](https://unicodekit.com/block/mathematical-operators) |
| Script | Common |
| Category | Math Symbol (Sm) |
| Unicode version | 1.1 |
| HTML | `∘` `∘` |
| CSS | `\2218` |
| JavaScript | `\u2218` |
| UTF-8 | E2 88 98 |
| UTF-16 | 2218 |

## Related characters

- ∗ [U+2217 ASTERISK OPERATOR](https://unicodekit.com/char/2217)
- ∙ [U+2219 BULLET OPERATOR](https://unicodekit.com/char/2219)
- ∖ [U+2216 SET MINUS](https://unicodekit.com/char/2216)
- √ [U+221A SQUARE ROOT](https://unicodekit.com/char/221A)
- ∕ [U+2215 DIVISION SLASH](https://unicodekit.com/char/2215)
- ∛ [U+221B CUBE ROOT](https://unicodekit.com/char/221B)
- ∔ [U+2214 DOT PLUS](https://unicodekit.com/char/2214)
- ∜ [U+221C FOURTH ROOT](https://unicodekit.com/char/221C)
- ∓ [U+2213 MINUS-OR-PLUS SIGN](https://unicodekit.com/char/2213)
- ∝ [U+221D PROPORTIONAL TO](https://unicodekit.com/char/221D)
- − [U+2212 MINUS SIGN](https://unicodekit.com/char/2212)
- ∞ [U+221E INFINITY](https://unicodekit.com/char/221E)

Page: https://unicodekit.com/char/2218 · JSON: https://unicodekit.com/characters/2218