Powerful Features of Swift with Examples

Swift, Apple’s modern programming language, is designed to make it easier to write and maintain code. It’s known for its performance, safety, and expressive syntax. Let’s explore some of the most powerful features of Swift with examples.

Swift Programming Language

1. Optionals

Optionals handle the absence of a value, a common source of bugs in many programming languages.

var name: String? = "Alison"
if let unwrappedName = name {
    print("Hello, \(unwrappedName)!")
} else {
    print("Name is nil")
}

This code ensures that unwrappedName is safely unwrapped before use, preventing runtime errors.

2. Type Inference

Swift can infer the type of a variable or constant, reducing the amount of boilerplate code.