bcsub is a php extension

bcsub is not an extension of PHP, but a built-in function in PHP. The bcsub function accepts two arbitrary precision numbers as strings and returns the subtraction of the two numbers after scaling the result to the specified precision.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

The bcsub() function in PHP is a built-in function , used to subtract one arbitrary-precision number from another. This function accepts two arbitrary-precision numbers as strings and returns the subtraction of the two numbers after scaling the result to the specified precision.

bcsub — Subtraction of 2 arbitrary-precision numbers

Description

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

Subtract the right operand from the left operand.

Parameter

left_operand

The left operand of string type.

right_operand

The right operand of string type.

scale

This optional parameter is used to set the decimal point after the decimal point in the result. Number of decimal places. You can also set a global default number of decimal places for all functions by using bcscale().

Return value

Return the result after subtraction to the string type.

Example

<?php
$a = &#39;1.234&#39;;
$b = &#39;5&#39;;
echo bcsub($a, $b);     // -3
echo bcsub($a, $b, 4);  // -3.7660
?>

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