bcsqrt

(PHP 4, PHP 5, PHP 7, PHP 8)

bcsqrtGet the square root of an arbitrary precision number

Description

bcsqrt(string $num, ?int $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