main.dart

void main() {
  print(resistorColor('Red'));
}

const List<String> colors = [
    'Black',
    'Brown',
    'Red',
    'Orange',
    'Yellow',
    'Green',
    'Blue',
    'Violet',
    'Grey',
    'White',
  ];

int resistorColor(String resistor) {
  return colors.indexOf(resistor);
}