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BcMath\Number::sub

PHP function Edit on GitHub ✎

(PHP 8 >= 8.4.0)

Subtracts an arbitrary precision number

Description

BcMath\Number::sub(BcMath\Number|string|int $num, int|null $scale = null): BcMath\Number

Subtracts num from $this.

Parameters

num: The value to subtract.

Return Values

Returns the result of subtraction as a new BcMath\Number object.

When the BcMath\Number::scale of the result object is automatically set, the greater BcMath\Number::scale of the two numbers used for subtraction is used.

Examples

BcMath\Number::sub example when scale is not specified

php

<?php
$number = new BcMath\Number('1.234');

$ret1 = $number->sub(new BcMath\Number('2.34567'));
$ret2 = $number->sub('-3.456');
$ret3 = $number->sub(7);

var_dump($number, $ret1, $ret2, $ret3);
?>

The above example will output:

output

object(BcMath\Number)#1 (2) {
  ["value"]=>
  string(5) "1.234"
  ["scale"]=>
  int(3)
}
object(BcMath\Number)#3 (2) {
  ["value"]=>
  string(8) "-1.11167"
  ["scale"]=>
  int(5)
}
object(BcMath\Number)#2 (2) {
  ["value"]=>
  string(5) "4.690"
  ["scale"]=>
  int(3)
}
object(BcMath\Number)#4 (2) {
  ["value"]=>
  string(6) "-5.766"
  ["scale"]=>
  int(3)
}

BcMath\Number::sub example of explicitly specifying scale

php

<?php
$number = new BcMath\Number('1.234');

$ret1 = $number->sub(new BcMath\Number('2.34567'), 1);
$ret2 = $number->sub('-3.456', 10);
$ret3 = $number->sub(7, 0);

var_dump($number, $ret1, $ret2, $ret3);
?>