U+221A "√" Square Root Unicode Character
Unicode Version 17.0
√
U+221A "√" Square Root is a mathematical symbol used to denote the principal square root of a number or expression, representing a value that when multiplied by itself yields the original quantity. It originates from the radical sign in mathematical notation, often extended with a vinculum to indicate the range of the radicand. In digital environments, this single character serves as the core symbol for square root operations, distinct from using a letter "v" or other approximations.
General Properties
| Code Point | U+221A |
| Version Added | 1.1 |
| Name | Square Root |
| Block | Mathematical Operators |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Mirrored | Yes |
Encodings
| HTML Decimal Encoding | √ |
| HTML Hex Encoding | √ |
| UTF-8 Encoding | 0xE2 0x88 0x9A |
| UTF-16 Encoding | 0x221A |
| UTF-32 Encoding | 0x0000221A |
| C/C++/Java Escape | \u221a |