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If you are new to PHP or just need to refresh your skills, this is the place to start. This series of tutorials will give you the basic knowledge you will need to create a simple PHP website.

PHP is a reflective programming language originally designed for producing dynamic web pages.[1] PHP is used mainly in server-side scripting, but can be used from a command line interface or in standalone graphical applications. Textual User Interfaces can also be created using ncurses.

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bcsqrt

(PHP 3, PHP 4, PHP 5)

bcsqrt -- Get the square root of an arbitrary precision number

Description

string bcsqrt ( string operand [, int scale] )

Return the square root of the operand.

Parameters

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().

Return Values

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

Examples

Example 1. bcsqrt() example

<?php

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

?>

See Also

bcpow()

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Another Useful functions:


function.bcsqrt |


PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. If you are new to PHP and want to get some idea of how it works, try the introductory tutorial. After that, check out the online manual, and the example archive sites and some of the other resources available in the links section.