Functions are the set of codes used to perform specific task. In Swift programming language, functions are used to pass local as well global parameter values inside the function’s call.
In Swift4, functions can be categorized in two types:
- User Defined Functions
- Built-in Functions (Library Functions)
In Swift, functions are self-contained blocks of code that perform a specific task. They allow you to define a set of instructions that can be called and executed multiple times throughout your code. Functions in Swift can take parameters, which are values passed into the function, and they can also return values to the code that calls them. Functions promote code reuse and modularity by encapsulating logic into reusable units.