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bcpowmod> <bcmul
Last updated: Fri, 18 Jul 2008

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bcpow

(PHP 4, PHP 5)

bcpow — Effettua l'elevamento a potenza

Descrizione

string bcpow ( string $x , string $y [, int $precisione ] )

Eleva x alla potenza y . Il parametro opzionale precisione può essere usato per impostare il numero di cifre dopo il punto decimale nel risultato.

Esempi

Example #1 bcpow() example

<?php

echo bcpow(4.232); // 74.08

?>

Vedere anche:

bcpowmod() e bcsqrt().



add a note add a note User Contributed Notes
bcpow
11-Feb-2005 01:58
Well, if bcpow has limits, then this should work:
<?php
function bcpow_($num, $power) {
   
$awnser = "1";
    while (
$power) {
       
$awnser = bcmul($awnser, $num, 100);
       
$power = bcsub($power, "1");
    }
    return
rtrim($awnser, '0.');
}
?>
Just that $power cannot have decimal digits in it.
Michael Bailey (jinxidoru at byu dot net)
09-Aug-2004 05:42
bcpow() only supports exponents less than or equal to 2^31-1.  Also, bcpow() does not support decimal numbers.  If you have scale set to 0, then the exponent is converted to an interger; otherwise an error is generated.

--
Michael Bailey
http://www.jinxidoru.com

bcpowmod> <bcmul
Last updated: Fri, 18 Jul 2008
 
 
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