sqrt
(PHP 4, PHP 5, PHP 7)
sqrt — Square root
Description
float sqrt ( float $arg ) 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 directive
echo sqrt(9); // 3
echo sqrt(10); // 3.16227766 ...
?>See Also
- pow() - Exponential expression
← sinh
srand →
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