The radical symbol by itself is used in math to represent taking the square root of an expression. It is also used to represent taking the th-root of a number when a number is place above the start of the symbol. Typically the radical symbol is used in an expression like this:

In plain language, this means take the square root of the number four. Shown below are various computer formats for the radical symbol.

Symbol Format Data
Unicode
8730
TeX
\sqrt{}
SVG

Usage

The radical symbol by itself is used to denote taking the square root of a number.

The radical operator returns the n-th root of the provided expression. The radical operator is an alternative way of writing a fractional exponent.