Optional Chaining example in Swift

OptionalChaining.swift

struct Person {
    var name: String
    var information: Information?
}

struct Information {
    var id: String
    var age: Int
}

var person = Person(name: "Moussa", information: Information(id: "id-1231424", age: 28))

// Using optional chaining to safely access the age property of the person's infrormation
if let age = person.information?.age {
    print("The person's age is \(age)")
} else {
    print("No age found")
}

// Changing the person's information to nil to see how optional chaining handles it
person.information = nil

// Using optional chaining to safely access the age property of the person's information, which is now nil
if let age = person.information?.age {
    print("The person's age is \(age)")
} else {
    print("No age found")
}