bcscale
bcsub
BC Math Функции
PHP Manual

# bcsqrt

(PHP 4, PHP 5)

bcsqrt — Get the square root of an arbitrary precision number

### Описание

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

Return the square root of the `operand` .

### Список параметров

`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().

### Возвращаемые значения

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

### Примеры

Пример #1 bcsqrt() example

`<?php
echo bcsqrt('2', 3); // 1.414
?>`

### Смотрите также

- bcpow()

bcscale
bcsub
BC Math Функции
PHP Manual