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gmp_mul

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

gmp_mulMultiply numbers

说明

gmp_mul(GMP|int|string $num1, GMP|int|string $num2): GMP

Multiplies num1 by num2 and returns the result.

参数

num1

A number that will be multiplied by num2.

GMP 对象或 int ,或数字string

num2

A number that will be multiplied by num1.

GMP 对象或 int ,或数字string

返回值

GMP 对象。

示例

示例 #1 gmp_mul() example

<?php
$mul
= gmp_mul("12345678", "2000");
echo
gmp_strval($mul) . "\n";
?>

以上示例会输出:

24691356000

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User Contributed Notes 1 note

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-12
Anonymous
17 years ago
<?php
function fact($x)
{
$factorial = 1;
for (
$i=2; $i < $x; $i++) {
$factorial = gmp_mul($factorial, $i);
}
return
$factorial;
}

echo
gmp_strval(fact(1000)) . "\n";
?>
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