bcmul
(PHP 4, PHP 5, PHP 7, PHP 8)
bcmul — Multiply two arbitrary precision numbers
Description
$num1, string $num2, ?int $scale = null): string
Multiply the num1 by the
num2.
Parameters
-
num1 -
The left operand, as a string.
-
num2 -
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
0if this has not been set.
Return Values
Returns the result as a string.
Changelog
| Version | Description |
|---|---|
| 8.0.0 |
scale is now nullable.
|
| 7.3.0 | bcmul() now returns numbers with the requested scale. Formerly, the returned numbers may have omitted trailing decimal zeroes. |
Examples
Example #1 bcmul() example
<?php
echo bcmul('1.34747474747', '35', 3); // 47.161
echo bcmul('2', '4'); // 8
?>
Notes
Note:
Before PHP 7.3.0 bcmul() 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 bcmul() scale example
<?php
echo bcmul('5', '2', 2); // prints "10", not "10.00"
?>
