PHP Manual
Prev |  | Next

# pow

(PHP 3, PHP 4 )

pow -- Exponential expression

## Description

number pow ( number base, number exp)

Returns `base` raised to the power of `exp`. If possible, this function will return an integer.

If the power cannot be computed, a warning will be issued, and pow() will return `FALSE`.

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(-1, 5.5); // error

    ?>

Warning
In PHP 4.0.6 and earlier pow() always returned a float, and did not issue warnings.

See also exp() and sqrt().

Prev | Home | Next
pi | Up | rad2deg