(PHP 4, PHP 5)
bcsqrt — Get the square root of an arbitrary precision number
$operand
[, int $scale
] )
Return the square root of the operand.
operand
The operand, as a string.
scaleThis optional parameter is used to set the number of digits after the decimal place in the result. You can also set the global default scale for all functions by using bcscale().
Returns the square root as a string, or NULL if
operand is negative.
Example #1 bcsqrt() example
<?php
echo bcsqrt('2', 3); // 1.414
?>