bcsqrt
PHP function
Edit on GitHub ✎
(PHP 4, PHP 5, PHP 7, PHP 8)
Get the square root of an arbitrary precision number
Description
bcsqrt(string $num, int|null $scale = null): string
Return the square root of num.
Parameters
numThe operand, as a well-formed BCMath numeric string.
Return Values
Returns the square root as a well-formed BCMath numeric string.
Errors/Exceptions
This function throws a ValueError in the following cases:
numis not a well-formed BCMath numeric stringnumis less than0scaleis outside the valid range
Changelog
| Version | Description |
|---|---|
| 8.0.0 | If num is not a well-formed BCMath numeric string, or less than 0, a ValueError is thrown. Previously, E_WARNING was raised instead. |
| 8.0.0 | scale now needs to be between 0 and 2147483647; previously, negative scales have been silently treated as 0. |
| 8.0.0 | scale is now nullable. |
Examples
bcsqrt() example
php
<?php
echo bcsqrt('2', 3); // 1.414
?>See Also
bcpow()BcMath\Number::sqrt