Roman Numeral Encoder
Encode an integer from 1 to 3999 into its canonical subtractive Roman numeral.
Description
Convert an integer from 1 through 3,999 into canonical modern Roman numerals.
Roman Numeral Encoder convert an integer from 1 through 3,999 into canonical modern Roman numerals.
Use this for chapter labels, outlines, display years, puzzle inputs, and interoperable round trips with the Roman numeral decoder.
When to use Roman Numeral Encoder
Use this for chapter labels, outlines, display years, puzzle inputs, and interoperable round trips with the Roman numeral decoder.
How it works
The encoder greedily emits values from M through I, including the standard subtractive pairs CM, CD, XC, XL, IX, and IV.
Interpreting the result
Keep the input units, direction conventions, encoding, and ordering rules visible when reusing the result. Preserve the full returned value for downstream calculations and round only for presentation.
Assumptions and limitations
The range excludes zero, negatives, fractions, and extended overline notation. Historical Roman inscriptions did not always use this modern canonical form.