Classes & Structures in Swift!

In Swift, classes and structures are two fundamental building blocks used for defining and implementing the functionality of your code. Both classes and structures allow you to encapsulate data and behavior within a single unit, but they have some key differences. Classes: Reference types: Instances are passed by reference. Supports inheritance. Can have deinitializers. Type casting is used (as, as?, as!). Used when you need reference semantics. Structures: Value types: Instances are passed by value (copied). Does not support inheritance. Does not have deinitializers. Automatic member wise initializers are provided. Used when you need value semantics or simple data structures.