What this does

This is a utility pack for converting integers to their English word representations. This was one cool feature that came built in to the Common Lisp implementation. This pack brings this functionality and other related ones to SWI Prolog.

Example usage

?- number_word([5,5,2,0,1,2,0,0,6], Word).
Word = [[five, hundred, fifty, two], million, [twelve], thousand, six]

?- number_word([0,0,6], Word).
Word = [six]

?- number_word(Number, [[one], thousand, three, hundred, seventy, two]).
Number = [0, 0, 1, 3, 7, 2]

?- number_word(Number, [[one], thousand, X, hundred, seventy, two]).
Number = [0, 0, 1, 1, 7, 2],
X = one ;
Number = [0, 0, 1, 2, 7, 2],
X = two ;
Number = [0, 0, 1, 3, 7, 2],
X = three ;
... etc.