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pow

Name

pow — Raises the first argument to the power of the second argument.

Synopsis

float pow(number, power); float number: Number to be raised float power: Power to which to raise the number

Returns

Result of raising one number to the power of another

Description

This function raises number to the power of power . For example, to raise 3 to the power of 2, the notation is pow(3, 2)() . See the example for pi() to see how this function applies when calculating the area of a circle.

Version

PHP 3, PHP 4

Example

Example 687. Use pow() to calculate a hypotenuse

$hyp = 5;
$adj = 4;
$opp = 3;
$hyp_calc = pow($opp, 2) + pow($adj, 2);
$hyp_true = pow($hyp, 2);
echo "a squared + b squared = $hyp_calc<BR />\n";
echo "c squared = $hyp_true\n";

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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

pow