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bcsub

(PHP 4, PHP 5, PHP 7)

bcsub — Subtract one arbitrary precision number from another

Description

bcsub ( string $num1 , string $num2 [, int|null $scale = null ] ) : string

Subtracts the num2 from the num1.

Parameters

num1: The left operand, as a string.
num2: The right operand, as a string.
scale: This optional parameter is used to set the number of digits after the decimal place in the result. If omitted, it will default to the scale set globally with the bcscale() function, or fallback to 0 if this has not been set.

Return Values

The result of the subtraction, as a string.

Changelog

Version	Description
8.0.0	`scale` is now nullable.

Examples

Example #1 bcsub() example

<?php

$a = '1.234';
$b = '5';

echo bcsub($a, $b);     // -3
echo bcsub($a, $b, 4);  // -3.7660

?>

See Also

bcadd() - Add two arbitrary precision numbers

© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.bcsub.php