√
Square Root
- Unicode
- U+221A
- Category
- Math
- HTML Entity
- √
- CSS
- \221A
The √ symbol represents the principal square root of a number in mathematics. Originating from a stylized lowercase "r" (for the Latin radix, meaning root), it became a standard mathematical notation in the 16th century. While mostly used in academic texts and equations, you might spot it online when people playfully reference math problems or "getting to the root" of an issue.
How to Type
- Windows
- Alt+251
- macOS
- Option+V
- Linux
- Ctrl+Shift+U then 221A
- HTML
- √ or √
In Programming
Most programming languages use built-in functions like Math.sqrt() rather than the √ symbol for mathematical calculations. However, the symbol is widely used in LaTeX (as \sqrt{x}) and technical documentation to cleanly render formulas visually.
Tags
Alt 251
HTML 8730
LaTeX sqrt
U+221A
algebra
calculation
calculator square root
mathematics
radical
radical sign
radical symbol
root
root symbol math
square root sign keyboard
square root symbol
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