php man page for bcsub

BCSUB(3)								 1								  BCSUB(3)

bcsub - Subtract one arbitrary precision number from another

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

DESCRIPTION
	Subtracts the $right_operand from the $left_operand.

PARAMETERS
	      o $left_operand
		- The left operand, as a string.

	      o $right_operand
		- The right operand, as a string.

	      o $
		scale  -This  optional	parameter  is used to set the number of digits after the decimal place in the result. You can also set the
		global default scale for all functions by using bcscale(3).

RETURN VALUES
	The result of the subtraction, as a string.

EXAMPLES
       Example #1

	      bcsub(3) example

	      <?php

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

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

	      ?>

SEE ALSO
       bcadd(3).

PHP Documentation Group 														  BCSUB(3)