Summary - Data types

Combine int, double, String and bool to write a calculation card.

In this group you learned Dart's basic data types: int (integer), double (decimal), String (text), bool (boolean) and dynamic (flexible).

You also saw type inference with var and runtime type checks with the is operator. We will practice with two small tasks.

In later lessons we will use these types in function parameters, collections and class fields. The foundation is laid here.

Exercise Calculation card

Inside void main() declare int quantity = 3, double price = 9.99, String name = 'Pen'. Print all three with print.

Show example solution

void main() {
  int quantity = 3;
  double price = 9.99;
  String name = 'Pen';
  print(quantity);
  print(price);
  print(name);
}

Inside void main() declare an int, a double and a String for a product. Set values to 5, 12.5 and Notebook. Print with print.

Show example solution

void main() {
  int quantity = 5;
  double price = 12.5;
  String name = 'Notebook';
  print(quantity);
  print(price);
  print(name);
}

Text type

____ name = 'Alex';

Show answer

String name = 'Alex';