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Последние активные темы форума |
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pow
(PHP 3, PHP 4 , PHP 5) pow -- Exponential expression
Descriptionnumber 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.
Замечание:
PHP cannot handle negative bases.
Пример 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
?>
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Внимание | In PHP 4.0.6 and earlier pow() always returned
a float, and did not issue warnings.
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Смотрите также:
exp(),
sqrt(),
bcpow(), and
gmp_pow(),
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