Php/docs/function.sqrt
From Get docs
sqrt
(PHP 4, PHP 5, PHP 7)
sqrt — Square root
Description
sqrt
( float $arg
) : float
Returns the square root of arg
.
Parameters
arg
- The argument to process
Return Values
The square root of arg
or the special value NAN
for negative numbers.
Examples
Example #1 sqrt() example
<?php// Precision depends on your precision directiveecho sqrt(9); // 3echo sqrt(10); // 3.16227766 ...?>