Backend Development 1 min read
PHP sqrt() Function – Returns the Square Root
The PHP sqrt() function returns the square root of a given float argument, returning NaN for negative inputs; the documentation details its syntax, parameter description, return value, and provides example code demonstrating usage with numbers like 9 and 10.
Laravel Tech Community
Laravel Tech Community
The sqrt() function in PHP calculates the square root of a floating‑point number.
Syntax : float sqrt(float $arg)
Parameter $arg : the number whose square root is to be computed.
Return value : the square root of $arg ; if $arg is negative, the function returns NAN .
Example :
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