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Get the square root of an arbitrary precision number
BC Math Functions
PHP Manual

bcsqrt

(PHP 4, PHP 5)

bcsqrt — Get the square root of an arbitrary precision number

Description

string bcsqrt ( string $operand [, int $scale ] )

Return the square root of the operand .

Parameters

operand

The operand, as a string.

scale

This 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().

Return Values

Returns the square root as a string, or NULL if operand is negative.

Examples

Example #1 bcsqrt() example

<?php

echo bcsqrt('2', 3); // 1.414

?>

See Also

BC Math Functions
PHP Manual