Is the object-oriented programming principle supported in Swift?

Yes, Swift supports the principles of object-oriented programming (OOP). In Swift, you can create classes that encapsulate data and methods, and inheritance, polymorphism, and encapsulation are supported. For example, you can define a class with properties and methods:

class Animal {
    var name: String

    init(name: String) {
        self.name = name
    }

    func speak() {
        print("Animal sound")
    }
}

class Dog: Animal {
    override func speak() {
        print("Woof!")
    }
}

let dog = Dog(name: "Buddy")
dog.speak() // Outputs: Woof!