Php/docs/function.pow
pow
(PHP 4, PHP 5, PHP 7)
pow — Exponential expression
Description
pow
( int|float $base
, int|float $exp
) : int|float
Returns base raised to the power of
exp.
Note:
In PHP 5.6 onwards, you may prefer to use the ** operator.
Parameters
base- The base to use
exp- The exponent
Return Values
base raised to the power of exp.
If both arguments are non-negative integers and the result can be represented
as an integer, the result will be returned with int type,
otherwise it will be returned as a float.
Examples
Example #1 Some examples of pow()
<?phpvar_dump(pow(2, 8)); // int(256)echo pow(-1, 20); // 1echo pow(0, 0); // 1echo pow(10, -1); // 0.1echo pow(-1, 5.5); // PHP >=5.2.2: NANecho pow(-1, 5.5); // PHP <5.2.2: -NAN?>
Notes
Note:
This function will convert all input to a number, even non-scalar values, which could lead to
weirdresults.
