17 lines
395 B
Dart
17 lines
395 B
Dart
String integerToRoman(int number) {
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const romanSymbols = {6: 'VI', 5: 'V', 1: 'I'};
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if (_isSubtractiveCase(number)) {
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return romanSymbols[1]! + romanSymbols[5]!;
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}
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if (_canRepeatSymbol(number)) {
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return romanSymbols[1]! * number;
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}
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return romanSymbols[number] ?? '';
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}
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bool _isSubtractiveCase(int number) => number == 4;
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bool _canRepeatSymbol(int number) => number < 4;
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