Php/docs/function.bcmul
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bcmul
(PHP 4, PHP 5, PHP 7)
bcmul — Multiply two arbitrary precision numbers
Description
bcmul
( string $num1
, string $num2
[, int|null $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
0
if 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
<?phpecho bcmul('1.34747474747', '35', 3); // 47.161echo 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
scale
parameter 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
<?phpecho bcmul('5', '2', 2); // prints "10", not "10.00"?>