Swift provides as with two basic constructs: Structures and Classes which are the building blocks of our code. Structures are value type. Classes are reference types.Structures and classes have the following similar characteristics:
- We can define methods
- We can define properties
- We can define subscripts
- We can define initializers
- We can extend them to perform additional functions
- We can make them conform to any protocols as needed
In addition to the above aspects, Classes also have the following characteristics:
- We can define deinitializers
- We can perform type casting
- We can inherit properties and methods from another class(Inheritance)
- We can perform reference counting
