gives a string corresponding to the Roman numeral form of the integer n.
- Roman numerals are formed using combinations of the letters I, V, X, L, C, D, and M.
- The number 0 is represented as the numeral "N", the initial letter of the word nulla.
- RomanNumeral[n] for a negative integer n produces the result corresponding to the absolute value of n.
- For numbers above 4999, specifications for overbars are inserted into the string given as the result.
Introduced in 2015