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<h2>Dart mode</h2>
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import 'dart:math' show Random;

void main() {
  print(Die(n: 12).roll());
}

// Define a class.
class Die {
  // Define a class variable.
  static final Random shaker = Random();

  // Define instance variables.
  final int sides;
  int? lastRoll;

  // Define a constructor.
  Die({int n = 6}) : sides = n {
    if (4 > n || n > 20) {
      // Support for errors and exceptions.
      throw ArgumentError(/* */);
    }
  }

  // Define a method using shorthand syntax.
  @override
  String toString() => '$lastRoll';

  // Define an instance method.
  int roll() {
    return lastRoll = shaker.nextInt(sides) + 1;
  }
}
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author	Coffee CMS <info@coffee-cms.ru>
date	Fri, 11 Oct 2024 22:40:23 +0000
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