# Problem in roman numeral converter challenge

Problem in roman numeral converter challenge
0

#1

There is a problem in running tests in roman numeral converter challenge for front-end development certification.
This is my code:

``````
function convertToRoman(num) {
num = num.toString();
var multiplier = 1;
var arr = num.split('');
arr.reverse();

for (i=0;i<arr.length;i++){
var digit = arr[i] * multiplier;
arr[i] = toRoman(digit);
multiplier *= 10;
}

arr.reverse();
return arr.join('');
}

function toRoman(num) {
switch (num) {
case 1: return 'I';
case 2: return 'II';
case 3: return 'III';
case 4: return 'IV';
case 5: return 'V';
case 6: return 'VI';
case 7: return 'VII';
case 8: return 'VIII';
case 9: return 'IX';
case 10: return 'X';
case 20: return 'XX';
case 30: return 'XXX';
case 40: return 'XL';
case 50: return 'L';
case 60: return 'LX';
case 70: return 'LXX';
case 80: return 'LXXX';
case 90: return 'XC';
case 100: return 'C';
case 200: return 'CC';
case 300: return 'CCC';
case 400: return 'CD';
case 500: return 'D';
case 600: return 'DC';
case 700: return 'DCC';
case 800: return 'DCCC';
case 900: return 'CM';
case 1000: return 'M';
case 2000: return 'MM';
case 3000: return 'MM';
case 4000: return 'MMMM';
}
}

convertToRoman(3999);

``````

When i run this code in freecodecamp, It passes all the tests except 3999. But, when i run this code in my console, it shows correct roman numerals for 3999. I had attached the screenshot of freecodecamp test below.

#2

Look carefully at the number the console shows compared to what the tests says it should be.

Your roman numeral in the console is missing an M on the frontend.