PHP Manual: Set or get default scale parameter for all bc math functions

Description

int bcscale(int $scale)

Sets the default scale parameter for all subsequent calls to bc math functions that do not explicitly specify a scale parameter.

int bcscale(null $scale = null)

Gets the current scale factor.

Parameters

scale: The scale factor.

Return Values

Returns the old scale when used as setter. Otherwise the current scale is returned.

Errors/Exceptions

This function throws a ValueError if scale is outside the valid range.

Changelog

Version	Description
8.0.0	`scale` is now nullable.
7.3.0	bcscale can now be used to get the current scale factor; when used as setter, it now returns the old scale value. Formerly, `scale` was mandatory, and bcscale always returned `true`.

Examples

Example #1 bcscale example

<?php

// default scale : 3
bcscale(3);
echo bcdiv('105', '6.55957'); // 16.007

// this is the same without bcscale()
echo bcdiv('105', '6.55957', 3); // 16.007

?>