## Roman Numerals

### Description

"Roman numerals, the numeric system used in ancient Rome, employs combinations of letters from the Latin alphabet to signify values. The numbers 1 to 10 can be expressed in Roman numerals as follows:
I, II, III, IV, V, VI, VII, VIII, IX, X.
The Roman numeral system is a cousin of Etruscan numerals. Use of Roman numerals continued after the decline of the Roman Empire. From the 14th century on, Roman numerals began to be replaced in most contexts by more convenient Hindu-Arabic numerals; however, this process was gradual, and the use of Roman numerals in some minor applications continues to this day."
See also http://en.wikipedia.org/wiki/Roman_numerals
Text has been published under the conditions described at http://creativecommons.org/licenses/by-sa/3.0/deed.de

### Notes

Smallest valid decimal number: 1
Largest valid decimal number: 49.999
The output appears in upper case characters. The NumericalChameleon has implemented the substractive notation.
The input is more tolerant, though. You could enter "iiii" as Roman numeral and click the "Switch source/target" button in order to see the representation as "IV" as being correctly implemented by the substractive notation. Alternatively you could also push he +1 button followed by the -1 button in order to achive the same effect.