√
Symbol  Format  Data 

√  Code Point 
U+221A 
TeX 
\sqrt{} 

SVG 
In math, the radical symbol is used 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 placed above the start of the symbol as shown below:
In plain language, this means “take the th root of the number ”. Read more…
Returns the square root of the provided expression.
The radical operator returns the nth root of the provided expression. The radical operator is an alternative way of writing a fractional exponent.