bcsub Subtract one arbitrary precision number from another


bcsub

(PHP 4, PHP 5)

bcsubSubtract one arbitrary precision number from another

说明

string bcsub ( string $left_operand , string $right_operand [, int $scale ] )

Subtracts the right_operand from the left_operand.

参数

left_operand

The left operand, as a string.

right_operand

The right operand, as a string.

scale

此可选参数用于设置结果中小数点后的小数位数。 也可通过使用 bcscale() 来设置全局默认的小数位数,用于所有函数。

返回值

The result of the subtraction, as a string.

范例

Example #1 bcsub() example

<?php

$a 
'1.234';
$b '5';

echo 
bcsub($a$b);     // -3
echo bcsub($a$b4);  // -3.7660

?>

参见

  • bcadd() - Add two arbitrary precision numbers


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