   #PHP Manual BCMath Arbitrary Precision Mathematics Functions bcsqrt
   Bzip2 Compression Functions

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                                     bcsub

   (PHP 3, PHP 4 )
   bcsub --  Subtract one arbitrary precision number from another

Description

   string bcsub ( string left_operand, string right_operand [, int
   scale])

   Subtracts the right_operand from the left_operand and returns the
   result in a string. The optional scale parameter is used to set the
   number of digits after the decimal place in the result.

   Example 1. bcsub() example
   <?php
   $a = 1.234;
   $b = 5;
   echo bcsub($a, $b);     // -3
   echo bcsub($a, $b, 4);  // -3.7660
   ?>

   See also bcadd().
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