bcsqrt
(PHP 4, PHP 5, PHP 7, PHP 8)
bcsqrt — Get the square root of an arbitrary precision number
Description
bcsqrt(string
$num, ?int $scale = null): string
Return the square root of the num.
Parameters
-
num -
The 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 square root as a string, or null if
num is negative.
Changelog
| Version | Description |
|---|---|
| 8.0.0 |
scale is now nullable.
|
Examples
Example #1 bcsqrt() example
<?php
echo bcsqrt('2', 3); // 1.414
?>
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