SOURCE

var intToRoman = function(num) {
    const valueSymbols = [[1000, "M"], [900, "CM"], [500, "D"], [400, "CD"], [100, "C"], [90, "XC"], [50, "L"], [40, "XL"], [10, "X"], [9, "IX"], [5, "V"], [4, "IV"], [1, "I"]];
    const roman = [];
    for (const [value, symbol] of valueSymbols) {
        while (num >= value) {
            num -= value;
            roman.push(symbol);
        }
        if (num == 0) {
            break;
        }
    }
    return roman.join('');
};

console.log(intToRoman(200));