Name

thousands - Thousands separator for large integers

Synopsis

:- use_module(library(thousands)).
main :-
    Seconds is 32 * 365 * n(86,400),
    Seconds =:= n(1,009,152,000),
    format('32 years in seconds: ~D~n', [n(1,009,152,000)]).

Description

A Prolog macro for specifying large numbers with a thousands separator. For example, instead of writing this:

format('32 years in seconds: ~D~n', [1009152000]).

One can write this

format('32 years in seconds: ~D~n', [n(1,009,152,000)]).

The extra commas help one visually parse the number and its relative magnitude.

Installation

Using SWI-Prolog 6.3 or later:

    $ swipl
    1 ?- pack_install(thousands).

Prolog files