Factorial in Dart

Example for versions Dart 1.1.1

This example uses recursive factorial definition. int datatype is an integer of arbitrary size. 

int factorial(int n) => n == 0 ? 1 : n * factorial(n - 1);

main() {
  for (int i = 0; i <= 16; ++i) {
    print('$i! = ${factorial(i)}');
  }
}