30-seconds-of-code/snippets/intToRoman.md

title, tags

title	tags
intToRoman	integer,roman

Convert Integer to Roman Number

Following snippet is useful for converting integer number into roman number.

Note:- This code is only useful for number between 1 and 3999. according to Wikipedia the largest number you can represent in Roman is 3999. click here

function intToRoman(num) {
  const lookup = {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 roman = '';
  for (let i in lookup ) {
    while ( num >= lookup[i] ) {
      roman += i;
      num -= lookup[i];
    }
  }
  return roman;
}

intToRoman(11); // XI
intToRoman(03); // III
intToRoman(1998) // MCMXCVIII