bcmul
Multiply two arbitrary precision numbers
Description
string bcmul(string $num1, string $num2, intnull $scale = null)
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.
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 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 bcmul scale example
<?php
echo bcmul('5', '2', 2); // prints "10", not "10.00"
?>