ant-utils/esm2015/convert-to-roman.js

Utility for idle games

/**
 * Convert number to roman number format
 *
 * @export
 * @param {number} num, range [1,4999]
 * @returns {string} roman format
 */
export function convertToRoman(num) {
    if (typeof num !== "number")
        num = num.toNumber();
    num = Math.floor(num);
    const roman = {
        M: 1000,
        CM: 900,
        D: 500,
        CD: 400,
        C: 100,
        XC: 90,
        L: 50,
        XL: 40,
        X: 10,
        IX: 9,
        V: 5,
        IV: 4,
        I: 1,
    };
    let str = "";
    for (const i of Object.keys(roman)) {
        const q = Math.floor(num / roman[i]);
        num -= q * roman[i];
        str += i.repeat(q);
    }
    return str;
}
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