Can you list different types of initializers used in programming?

In programming, especially in iOS (Swift/Objective-C), there are various types of initializers:

• Designated Initializers: The primary initializers of a class that initialize all properties and call superclass initializers.

• Convenience Initializers: Helper initializers that call other initializers of the same class to simplify object creation with different parameters.

• Required Initializers: Initializers that must be implemented in all subclasses.

• Failable Initializers: Initializers that can return nil if initialization fails.

• Default Initializers: Automatically generated initializers if all properties have default values.

Example in Swift:

class Person {
    var name: String
    var age: Int

    // Designated initializer
    init(name: String, age: Int) {
        self.name = name
        self.age = age
    }

    // Convenience initializer
    convenience init(name: String) {
        self.init(name: name, age: 0)
    }

    // Failable initializer
    init?(name: String, age: Int?) {
        guard let age = age else { return nil }
        self.name = name
        self.age = age
    }
}