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Learn Dart: The First Step to Flutter

Solution: E-Commerce Order Processor

Explore how to implement an e-commerce order processor in Dart by mastering flow control statements. Learn to iterate over order statuses with for-in loops, use continue to skip cancelled orders, and apply switch cases to route active orders correctly, ensuring thorough and maintainable control flow management.

We'll cover the following...
Dart
void main() {
  final orderStatuses = ['PENDING', 'CANCELLED', 'SHIPPED', 'UNKNOWN', 'PENDING'];
  
  for (final status in orderStatuses) {
    if (status == 'CANCELLED') {
      continue;
    }
    
    switch (status) {
      case 'PENDING':
        print('Route to packing line.');
      case 'SHIPPED':
        print('Route to tracking system.');
      default:
        print('Flag for manual review.');
    }
  }
}

Solution explanation

In the main.dart file:

  • Line 4: ...