Symbol Format Data
Code Point
U+221A
TeX
\sqrt{}
SVG

## Usage

The radical symbol is used in math to represent taking the square root of an expression. Typically the radical symbol is used in an expression like this:

In plain language, this means take the square root of the number four. The radical symbol is also used to represent taking the -th root of a number when a number is place above the start of the symbol as shown below:

In plain language, this means take the -th root of the number . For example, the cube root of the number is represented by the following expression.