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Sep 16th, 2019
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  1. function toRoman(num) {
  2. let result = '';
  3. const decimal = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1];
  4. const roman = ["M", "CM","D","CD","C", "XC", "L", "XL", "X","IX","V","IV","I"];
  5. for (let i = 0;i<=decimal.length;i++) {
  6. while (num%decimal[i] < num) {
  7. result += roman[i];
  8. num -= decimal[i];
  9. }
  10. }
  11. return result;
  12. }
  13.  
  14. toRoman(123); //returns "CXXIII"
  15. toRoman(3290); // returns "MMMCCXC"
  16. toRoman(777); // returns "DCCLXXVII"
  17. toRoman(949); // returns "CMXLIX"
  18. toRoman(2000); // returns "MM"
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