PHP 7.1.0 Release Candidate 4 Released


(PHP 4, PHP 5, PHP 7)

bcsubSubtract one arbitrary precision number from another


string bcsub ( string $left_operand , string $right_operand [, int $scale = 0 ] )

Subtracts the right_operand from the left_operand.



The left operand, as a string.


The right operand, as a string.


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.


Example #1 bcsub() example


$b '5';

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


See Also

  • bcadd() - Add two arbitrary precision numbers

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User Contributed Notes 1 note

info at DONOTSPAM dot ict-eagle dot eu
7 years ago
Note that it is almost useless to put a integer higher than 6 maybe 7 in the scale parameter.

In some cases this might be needed. But for the simple souls, more than 4 is not required in most of the time.
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