Silly::StringMaths provides support for basic integer mathematics, using
strings rather than numbers. Upper-case letters are positive,
lower-case letters are negative, so ABCDEF would be 6 (but
WOMBAT would also be 6), whereas C<positive> would actually be
-8. Mixed-case is also possible, so Compaq is actually -5.
Most methods return a canonicalised version of the string -
e.g. C<ampq> rather than C<Compaq> (mixed case removed,
the result sorted alphabetically).

The behaviour of other characters is as yet undefined, but be
warned that non-alphabetical characters may be reserved for
floating point or imaginary numbers.

Actual numbers (i.e. the characters 0 to 9) will I<never> be used
by this module.

Sample code:

  use Silly::StringMaths qw(add subtract multiply divide exponentiate);

  # Add two positive numbers - returns ABFOOR
  print add("FOO", "BAR");

  # Add a generally positive number and a negative number
  # - returns ot
  print add("FNoRD", "yncft");

  # Subtract several numbers from a rather large one
  # - returns accdeiiiiloopssu
  print subtract("Supercalifragilisticepsialidocious",
					  "stupid", "made", "up", "word");

  # Multiply two negative numbers - returns AAACCCCCCEEELLLNNN
  print multiply("cancel", "out");

  # Divide two numbers - returns AAA
  print divide("EuropeanCommission", "France");

  # Confirm Pythagorus' theorum - returns nothing
  print subtract(exponentiate("FETLA", "PI"),
					  exponentiate("TLA", "PI"),
					  exponentiate("ETLA", "PI"));

All comments on further applications (e.g. floating point) to
Sam Kington, sam@illuminated.co.uk.