Converts a number to a Roman numeral string

roman.js

const roman = (n) => {
  n = String(Math.floor(Math.abs(n)))
  let element, i, result = ''
  const table = [
    ['', 'I', 'II', 'III', 'IV', 'V', 'VI', 'VII', 'VIII', 'IX'],
    ['', 'X', 'XX', 'XXX', 'XL', 'L', 'LX', 'LXX', 'LXXX', 'XC'],
    ['', 'C', 'CC', 'CCC', 'CD', 'D', 'DC', 'DCC', 'DCCC', 'CM']
  ]
      
  for (i = 0; i < table.length; i += 1) {
    element = table[i][n.slice(-1)]
    
    if (element) {
      result = element + result
    }
    n = n.slice(0, -1)
  }
  return 'M'.repeat(+n) + result
 }