Exponential expression
Syntax
pow ( number $base , number $exp ) : number
Parameters
base
The base to use
exp
The exponent
Return
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 integer type, otherwise it will be returned as a float.
Examples
1
<? $base = 2; $exp = -4; $return = pow($base, $exp); echo $return; ?>
0.0625
2
<? $base = 2; $exp = 4; $return = pow($base, $exp); echo $return; ?>
16
3
<? echo 2 ** -4 . PHP_EOL; echo 2 ** 4; ?>
0.0625 16
