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PHP Manual :: pow



pi || rad2deg || Math Functions || PHP Manual

(PHP 4, PHP 5, PHP 7)

powExponential 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(28)); // int(256)
echo pow(-120); // 1
echo pow(00); // 1

echo pow(-15.5); // PHP >4.0.6  NAN
echo pow(-15.5); // PHP <=4.0.6 1.#IND
?>

Notes

Note:

This function will convert all input to a number, even non-scalar values, which could lead to weird results.

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 || Math Functions || PHP Manual
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