(PHP 4, PHP 5)
bcpow — Raise an arbitrary precision number to another
$left_operand
, string $right_operand
[, int $scale
] )
Raise left_operand to the power
right_operand.
left_operand
The left operand, as a string.
right_operand
The right operand, as a string.
scaleThis 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().
Returns the result as a string.
Example #1 bcpow() example
<?php
echo bcpow('4.2', '3', 2); // 74.08
?>
Note:
bcpow() may return a result with fewer digits after the decimal point than the
scaleparameter would indicate. This only occurs when the result doesn't require all of the precision allowed by thescale. For example:Example #2 bcpow() scale example
<?php
echo bcpow('5', '2', 2); // prints "25", not "25.00"
?>