This 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().
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() - Raise an arbitrary precision number to another, reduced by a specified modulus
bcsqrt() - Get the square root of an arbitrary precision number
PHP General