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gmp_nextprime> <gmp_mul
[edit] Last updated: Fri, 17 May 2013

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gmp_neg

(PHP 4 >= 4.0.4, PHP 5)

gmp_negNegate number

说明

resource gmp_neg ( resource $a )

Returns the negative value of a number.

参数

a

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

返回值

Returns -a, as a GMP number.

范例

Example #1 gmp_neg() example

<?php
$neg1 
gmp_neg("1");
echo 
gmp_strval($neg1) . "\n";
$neg2 gmp_neg("-1");
echo 
gmp_strval($neg2) . "\n";
?>

以上例程会输出:

-1
1



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