Görkem Güray

In this section, we will examine Swift’s solutions for null references (variables with no value), known as optionals.

How to Create and Use Swift Protocol? #Protocol is similar to contracts in Swift. It allows us to define what kind of functions we expect a data type to support, so we can follow those rules in the rest of our code.

Classes are quite similar to Struct at first glance. With Classes we can create new data types with their own properties and methods.

Swift Access Control #By default, Swift Structs have no limitations on access to property and method.

How to Create a Struct? #The struct in Swift allows us to create a comprehensive, custom data type with its own variables and its own functions.