[Dart article] Handling exceptions in synchronous code

dart_sync_exceptions.dart

try {
    final _ = 100 ~/ 0;
  } on IntegerDivisionByZeroException {
    print('Cant divide to zero');
  } finally {
    print('Clean-up done 1');
  }

  print('\n\n');

  try {
    throw FormatException('format is wrong');
  } on IntegerDivisionByZeroException {
    print('Cant divide to zero');
  } on FormatException catch (e) {
    print('Format exceptions $e');
  } finally {
    print('Clean-up done 2');
  }

  print('\n\n');

  try {
    print('Allocate something 3');
    throw 'Other error occurred';
  } on IntegerDivisionByZeroException {
    print('Cant divide to zero');
  } on FormatException catch (e) {
    print('Format exceptions: $e');
  } catch (e, s) {
    print('Unknown exceptions: $e, with stack: \n$s');
    rethrow;
  } finally {
    print('Clean-up something 3');
  }