pow
pow
(PHP 4, PHP 5, PHP 7)
pow — Exponential expression
Description
number pow ( number $base , number $exp )
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 integer type, otherwise it will be returned as a float.
Examples
Example #1 Some examples of pow()
<?php
var_dump(pow(2, 8) // int(256)
echo pow(-1, 20 // 1
echo pow(0, 0 // 1
echo pow(10, -1 // 0.1
echo pow(-1, 5.5 // PHP >=5.2.2: NAN
echo 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 toweirdresults.
See Also
- exp() - Calculates the exponent of e
- sqrt() - Square root
- bcpow() - Raise an arbitrary precision number to another
- gmp_pow() - Raise number into power
← pi
rad2deg →
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Licensed under the Creative Commons Attribution License v3.0 or later.
