Amco challenge: romanToDecimalNumber

main.dart

class RomanNumbers {
  static int romanToDecimal(String romanNumber) {
    Map<String, int> romanMap = {
      'I': 1,
      'V': 5,
      'X': 10,
      'L': 50,
      'C': 100,
      'D': 500,
      'M': 1000,
    };

    int decimalValue = 0;

    for (int i = 0; i < romanNumber.length; i++) {
      int currentValue = romanMap[romanNumber[i]] ?? 0;
      int nextValue = (i + 1 < romanNumber.length)
          ? romanMap[romanNumber[i + 1]] ?? 0
          : 0;

      if (currentValue < nextValue) {
        decimalValue -= currentValue;
      } else {
        decimalValue += currentValue;
      }
    }

    return decimalValue;
  }
}

void main() {
  int value = RomanNumbers.romanToDecimal("XLIV");
  if (value == 44) {
    print("Success!");
  }
}