BC Math Functions

bcpow

Raise an arbitrary precision number to another

Description

string bcpow ( string $left_operand , string $right_operand [, int $scale = 0 ] )

Raise left_operand to the power right_operand.

Parameters

left_operand: The left operand, as a string.
right_operand: The right operand, as a string.
scale: This optional parameter is used to set the number of digits after the decimal place in the result. If omitted, it will default to the scale set globally with the bcscale function, or fallback to 0 if this has not been set.

Return Values

Returns the result as a string.

Examples

Example #1 bcpow example


<?php

echo bcpow('4.2', '3', 2); // 74.08

?>

Notes

Note:
bcpow may return a result with fewer digits after the decimal point than the scale parameter would indicate. This only occurs when the result doesn't require all of the precision allowed by the scale. For example:

Example #2 bcpow scale example

<?php echo bcpow('5', '2', 2); // prints "25", not "25.00" ?>

See Also

bcpowmod
bcsqrt