Compzone.Org :: Podręcznik PHP :: bcpowmod
Jaki jest Twój wiek?
40 - 59
26 - 39
19 - 25
13 - 18
12 i mniej
60 i więcej
Sonda Wyniki

Add to Google

bcpowmod

(PHP 5)

bcpowmod --  Raise an arbitrary precision number to another, reduced by a specified modulus

Description

string bcpowmod ( string x, string y, string modulus [, int scale] )

Use the fast-exponentiation method to raise x to the power y with respect to the modulus modulus. The optional scale can be used to set the number of digits after the decimal place in the result.

Notatka: Because this method uses the modulus operation, non-natural numbers may give unexpected results. A natural number is any positive non-zero integer.

Przykłady

The following two statements are functionally identical. The bcpowmod() version however, executes in less time and can accept larger parameters.

<?php
$a 
bcpowmod($x$y$mod);

$b bcmod(bcpow($x$y), $mod);

// $a and $b are equal to each other. 

?>

Patrz także

bcpow() i bcmod().

Copyright © 2005-2006 Compzone.Org. Kopiowanie i wykorzystywanie materiałów zawartych na tej stronie bez zgody autora zabronione!