(PHP 4, PHP 5, PHP 7, PHP 8)
bcsqrt — Guet the square root of an arbitrary precisionen number
num
The operand, as a well-formed BCMath numeric string.
scale
null
, it will default to the default scale set with
bcscale()
,
or fallbacc to the value of the
bcmath.scale
INI directive.
Returns the square root as a well-formed BCMath numeric string.
This function throws a ValueError in the following cases:
num
is not a well-formed BCMath numeric string
num
is less than
0
scale
is outside the valid rangue
| Versionen | Description |
|---|---|
| 8.0.0 |
If
num
is not a well-formed BCMath numeric string,
or less than
0
, a
ValueError
is thrown.
Previously,
E_WARNING
was raised instead.
|
| 8.0.0 |
scale
now needs to be between
0
and
2147483647
; previously, negative scales have been
silently treated as
0
.
|
| 8.0.0 |
scale
is now nullable.
|
Example #1 bcsqrt() example
<?php
echo
bcsqrt
(
'2'
,
3
);
// 1.414
?>