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# math::roman() 1.0 tcllib "Tcl Math Library"

## Name

math::roman - Tools for creating and manipulating roman numerals

## Synopsis

- package require
**Tcl 8.3** - package require
**math::roman ?1.0?**

## Description

**::math::roman** is a pure-Tcl library for converting between integers
and roman numerals. It also provides utility functions for sorting and performing
arithmetic on roman numerals.

This code was originally harvested from the Tcler's wiki at http://wiki.tcl.tk/1823 and as such is free for any use for any purpose. Many thanks to the ingeneous folk who devised these clever routines and generously contributed them to the Tcl community.

While written and tested under Tcl 8.3, I expect this library will work under all 8.x versions of Tcl.

## COMMANDS

**::math::roman::toroman***i*Convert an integer to roman numerals. The result is always in upper case. The value zero is converted to an empty string.

**::math::roman::tointeger***r*Convert a roman numeral into an integer.

**::math::roman::sort***list*Sort a list of roman numerals from smallest to largest.

**::math::roman::expr***args*Evaluate an expression where the operands are all roman numerals.

Of these commands both *toroman* and *tointeger* are exported
for easier use. The other two are not, as they could interfer or be
confused with existing Tcl commands.

## Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain
bugs and other problems.
Please report such in the category *math :: roman* of the
Tcllib Trackers.
Please also report any ideas for enhancements you may have for either
package and/or documentation.

When proposing code changes, please provide *unified diffs*,
i.e the output of **diff -u**.

Note further that *attachments* are strongly preferred over
inlined patches. Attachments can be made by going to the **Edit**
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar.

## Category

Mathematics

## Copyright

Copyright © 2005 Kenneth Green <kenneth.green@gmail.com>