digitaljoni

void main() {
  final String name = 'Joni'; // final variable can be set only once
  const double pi = 3.14159265359; // compile-time constant
  
  
  name = 'Jones'; // error
  pi = 123; // error

  print('name is $name');
  print('area of a circle with radius of 3 is ${pi * (3 * 3)}');

digitaljoni

void main() {
  List<String> itemParts = [
    'Raspberry Pi',
    'Power Supply',
    'Memory Card',
    'Official Case',
  ];

  print(itemParts[1]); // 'Power Supply'
  print(itemParts[3]); // 'Official Case'

digitaljoni

void main() {
  String productName = 'Raspberry Pi';

  print(productName.length);
  print(productName.toUpperCase());
  print(productName.substring(1, 10));

  String productImageName = productName.replaceAll(' ', '_').toLowerCase();
  print('$productImageName.jpg');

digitaljoni

void main() {
  // Declaring Variables
  var productName = 'Raspberry Pi'; // type inference (String)
  int itemQuantity = 42; // type annotation - better
  double itemPrice = 3499.00;
  bool isDiscounted = true;
  double discount = .10;

  print(productName);
  print('Qty: $itemQuantity'); // string interpolation

digitaljoni

void main() {
  final CardDeck newDeck = CardDeck.create();
  
  print(newDeck);
}



enum Suit {
  diamond,