FromRomanNumeral

gives the integer corresponding to the Roman numeral "string".

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Convert a Roman numeral into a decimal integer:

Convert a list of Roman numerals into respective decimal integers:

Roman numerals can be given in upper case, in lower case, or a mixture of both:

The numeral "N" represents the integer 0:

FromRomanNumeral threads automatically over lists of numerals:

RomanNumeral converts a decimal integer into its Roman numeral form:

FromRomanNumeral["string"] is equivalent to FromDigits["string","Roman"]:

FromRomanNumeral can interpret nonstandard forms of Roman numerals, with a warning message:

In fact, any combination of valid digits is interpreted as an integer:

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