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bcsqrt

(PHP 4, PHP 5, PHP 7)

bcsqrt — Get the square root of an arbitrary precision number

Description

bcsqrt ( string $num [, int|null $scale = null ] ) : string

Return the square root of the num.

Parameters

num: The operand, as a string.
scale: This optional parameter is used to set the number of digits after the decimal place in the result. If omitted, it will default to the scale set globally with the bcscale() function, or fallback to 0 if this has not been set.

Return Values

Returns the square root as a string, or null if num is negative.

Changelog

Version	Description
8.0.0	`scale` is now nullable.

Examples

Example #1 bcsqrt() example

<?php

echo bcsqrt('2', 3); // 1.414

?>

See Also

bcpow() - Raise an arbitrary precision number to another

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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.bcsqrt.php