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. Since PHP 4.2.0 pow() doesn't issue any warning.
Note: PHP cannot handle negative bases.
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(), sqrt(), bcpow() and gmp_pow(),
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