Algorithm Roman Numeral Converter

Algorithm Roman Numeral Converter

Problem Explanation:

• You will create a program that converts an integer to a Roman Numeral.

Hint: 1

• Creating two arrays, one with the Roman Numerals and one with the decimal equivalent for the new forms will be very helpful.

Hint: 2

• If you add the numbers to the arrays that go before the new letter is introduced, like values for 4, 9, and 40, it will save you plenty of code.

Hint: 3

• You can't have more than three consecutive Roman numerals together.

Spoiler Alert!

Solution ahead!

Code Solution:

var convertToRoman = function(num) {

  // Create arrays with default conversion with matching indices.
  var decimalValue = [ 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 ];
  var romanNumeral = [ 'M', 'CM', 'D', 'CD', 'C', 'XC', 'L', 'XL', 'X', 'IX', 'V', 'IV', 'I' ];

  //empty string variable for the final roman number

  var romanized = '';

  // Loop through the indices of the decimalValue array.
  for (var index = 0; index < decimalValue.length; index++) {
    // Continue to loop while the value at the current index will fit into numCopy
    while (decimalValue[index] <= num) {
      // Add the Roman numeral & decrease numCopy by the decimal equivalent.
      romanized += romanNumeral[index];
      num -= decimalValue[index];
    }
  }

  return romanized;
}

// test here
convertToRoman(36);

🚀 Run Code

Code Explanation:

• Read comments on code.

Credits:

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