# `gno.land/p/moul/x/daily/romannum/v0` **Roman-numeral converter** — `ToRoman`, `FromRoman`. A pure port of the classic kata, valid for **1..3999**. `ToRoman` uses greedy subtractive notation (panics out of range); `FromRoman` accepts a numeral only if it is canonical (it must round-trip through `ToRoman`), so malformed forms like `IIII`, `VV`, or `IC` are rejected. Deterministic — no time, randomness, or I/O — and free of any realm coupling. ```go import "gno.land/p/moul/x/daily/romannum/v0" s := romannum.ToRoman(2024) // "MMXXIV" n := romannum.FromRoman(s) // 2024 (panics on a malformed numeral) ``` **Live demo:** [`r/moul/x/daily/romannumdemo`](https://github.com/moul/gno-contracts/tree/main/r/moul/x/daily/romannumdemo/v0) · render it at [`/r/moul/x/daily/romannumdemo/v0`](https://gno.land/r/moul/x/daily/romannumdemo/v0). --- Part of **[moul/gno-contracts](https://github.com/moul/gno-contracts)** — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage. > 🧪 **Highly experimental — potentially vibe-coded.** Not audited; may break, change, or be removed at any time. Do not use with anything of value. Full disclaimer: [DISCLAIMER](https://github.com/moul/gno-contracts/blob/main/DISCLAIMER.md).