RomanNumeral

The Roman numeral for a non-negative integer, as a string.

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RomanNumeral(n)the Roman numeral for $0 \le n \le 3999$, the largest with the standard symbols

Typed signatures

Type	Package	Applies
(integer) -> string	numerals	always

Domain: Numeral systems

Details

• Written subtractively: 4 is IV, not IIII; 1988 is MCMLXXXVIII
• 0 is N, for the Latin nulla — Roman numerals otherwise have no zero

Examples

Basic #

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In$\mathrm{RomanNumeral}(1\,988)$Out$\text{MCMLXXXVIII}$

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In$\mathrm{RomanNumeral}(2\,024)$Out$\text{MMXXIV}$

A year, as a Roman numeral

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In$\mathrm{RomanNumeral}(2\,023)$Out$\text{MMXXIII}$

Scope #

the largest with standard symbols

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In$\mathrm{RomanNumeral}(3\,999)$Out$\text{MMMCMXCIX}$

Listable; 4 is written subtractively

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In$\mathrm{RomanNumeral}(\bigl\lbrack1, 2, 3, 4\bigr\rbrack)$Out$\bigl\lbrack\text{I}, \text{II}, \text{III}, \text{IV}\bigr\rbrack$

Threads over a list, with subtractive forms like IV

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In$\mathrm{RomanNumeral}(\bigl\lbrack1, 2, 3, 4, 5, 10, 50, 60, 100, 250, 500, 1\,000, 1\,500, 2\,600\bigr\rbrack)$Out$\bigl\lbrack\text{I}, \text{II}, \text{III}, \text{IV}, "V", \text{X}, "L", \text{LX}, "C", \text{CCL}, \text{D}, \text{M}, \text{MD}, \text{MMDC}\bigr\rbrack$

The first ten Roman numerals

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In$\mathrm{RomanNumeral}(1..10)$Out$\bigl\lbrack\text{I}, \text{II}, \text{III}, \text{IV}, "V", \text{VI}, \text{VII}, \text{VIII}, \text{IX}, \text{X}\bigr\rbrack$

Properties #

Near the upper limit of standard notation, 3749

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In$\mathrm{RomanNumeral}(3\,749)$Out$\text{MMMDCCXLIX}$

A typical four-digit conversion

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In$\mathrm{RomanNumeral}(1\,234)$Out$\text{MCCXXXIV}$

One less than 3749, differing in the last digits

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In$\mathrm{RomanNumeral}(3\,748)$Out$\text{MMMDCCXLVIII}$

Possible issues #

zero is written N, for nulla

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In$\mathrm{RomanNumeral}(0)$Out$"N"$

About

Examples	11
Checked against	Wolfram Language 11 agree
Crosswalk	Wolfram Language

See also: IntegerString