roman_numeral_converter.js

/*

Convert the given number into a roman numeral.

All roman numerals answers should be provided in upper-case.
1 = I
5 = V
10 = X
50 = L
100 = C
500 = D
1000 = M

*/

function convertToRoman(num) {

    const nums = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1];
    const roman = ['M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I'];

    let answer = "";

    for (let i = 0; i < nums.length; i++) {
        while (num >= nums[i]) {
            answer += roman[i];
            num -= nums[i];
        };
    }
    console.log(answer);
    return answer;
}

convertToRoman(36); // should retunr "XXXVI"
convertToRoman(2) // should return "II".
convertToRoman(3) // should return "III".
convertToRoman(4) // should return "IV".
convertToRoman(5) // should return "V".
convertToRoman(9) // should return "IX".
convertToRoman(12) // should return "XII".
convertToRoman(16) // should return "XVI".
convertToRoman(29) // should return "XXIX".
convertToRoman(44) // should return "XLIV".
convertToRoman(45) // should return "XLV"
convertToRoman(68) // should return "LXVIII"
convertToRoman(83) // should return "LXXXIII"
convertToRoman(97) // should return "XCVII"
convertToRoman(99) // should return "XCIX"
convertToRoman(500) // should return "D"
convertToRoman(501) // should return "DI"
convertToRoman(649) // should return "DCXLIX"
convertToRoman(798) // should return "DCCXCVIII"
convertToRoman(891) // should return "DCCCXCI"
convertToRoman(1000) // should return "M"
convertToRoman(1004) // should return "MIV"
convertToRoman(1006) // should return "MVI"
convertToRoman(1023) // should return "MXXIII"
convertToRoman(2014) // should return "MMXIV"
convertToRoman(3999) // should return "MMMCMXCIX"