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bcsqrt

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

bcsqrt — Get the square root of an arbitrary precision number

Опис

bcsqrt(string $num, ?int $scale = null): string

Return the square root of num.

Параметри

num

The operand, as a well-formed BCMath numeric string.

scale
This parameter is used to set the number of digits after the decimal place in the result. If null, it will default to the default scale set with bcscale(), or fallback to the value of the bcmath.scale INI directive.

Значення, що повертаються

Returns the square root as a well-formed BCMath numeric string.

Помилки/виключення

This function throws a ValueError in the following cases:

Журнал змін

Версія Опис
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.

Приклади

Приклад #1 bcsqrt() example

<?php

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

?>

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