JavaScript-Algorithms-and-Data-Structures-Projects-Roman-Numeral-Converter/RomanNumeralConverter at master · TurtleWolfe/JavaScript-Algorithms-and-Data-Structures-Projects-Roman-Numeral-Converter · GitHub

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function convertToRoman(num) {
let romanString = '';
while (num > 0){
switch (true) {
  // triple digits
  case (num > 999):
    romanString = romanString.concat('M');
    num = num -1000;
    break;
  case (num > 899):
    romanString = romanString.concat('CM');
    num = num -900;
    break;
  case (num > 499):
    romanString = romanString.concat('D');
    num = num -500;
    break;
  case (num > 499):
    romanString = romanString.concat('D');
    num = num -500;
    break;
  case (num > 399):
    romanString = romanString.concat('CD');
    num = num -400;
    break;
  case (num > 99):
    romanString = romanString.concat('C');
    num = num -100;
    break;
// double digits
  case (num > 90):
    romanString = romanString.concat('XC');
    console.log(romanString);
    num = num -90;
    break;
  case (num > 80):
    romanString = romanString.concat('LXXX');
    num = num -80;
    break;
  case (num > 50):
    romanString = romanString.concat('L');
    num = num -50;
    break;
  case (num > 39):
    romanString = romanString.concat('XL');
    num = num -40;
    break;
  case (num > 30):
    romanString = romanString.concat('XXX');
    num = num -30;
    break;
//single digits
  case (num > 9):
    romanString = romanString.concat('X');
    console.log(romanString);
    num = num -10;
    break;
  case (num > 8):
    romanString = romanString.concat('IX');
    num = num -9;
    break;
  case (num > 4):
    romanString = romanString.concat('V');
    num = num -5;
    break;
  case (num > 3):
    romanString = romanString.concat('IV');
    num = num -5;
    break;
  case (num > 0):
    romanString = romanString.concat('I');
    num = num -1;
    break;
  default:
    console.log(num);
  }//end of switch
  }//end of while..
  console.log(romanString);
  return romanString;
}//end of function convertToRoman(num)
//  convertToRoman(3);
//  convertToRoman(4);
//  convertToRoman(5);
//  convertToRoman(6);
//  convertToRoman(7);
//  convertToRoman(8);
//  convertToRoman(9);
//  convertToRoman(10);
//  convertToRoman(11);
//  convertToRoman(12);
//  convertToRoman(13);
//  convertToRoman(14);
//  convertToRoman(15);
//  convertToRoman(16);
//  convertToRoman(17);
//  convertToRoman(18);
//  convertToRoman(19);
//  convertToRoman(20);
//  convertToRoman(21);
//  convertToRoman(22);
//  convertToRoman(23);
//  convertToRoman(36);
//  convertToRoman(39); // should return "XXXIX".
//  convertToRoman(42); // should return "XLII".
//  convertToRoman(40); //  should return "XL"
//  convertToRoman(44); // should return "XLIV".
//  convertToRoman(45); //  should return "XLV"
convertToRoman(49); //  should return "XLIX"
//  convertToRoman(68); //  should return "LXVIII"
//  convertToRoman(96); //  should return "XCVI"
//  convertToRoman(97); //  should return "XCVII"
//  convertToRoman(98); //  should return "XCVIII"
//  convertToRoman(99); //  should return "XCIX"
//  convertToRoman(100); //  should return "C"
//  convertToRoman(333); //  should return "CCCXXXIII"
//  convertToRoman(400); //  should return "CD"
//  convertToRoman(500); //  should return "D"
//  convertToRoman(666); //  should return "DCLXVI"
//  convertToRoman(999); //  should return "CMXCIX"
//  convertToRoman(1000);
//  convertToRoman(649); //  should return "DCXLIX"
//  convertToRoman(798); //  should return "DCCXCVIII"
//  convertToRoman(891); //  should return "DCCCXCI"
//  convertToRoman(3999); //  should return "MMMCMXCIX"