How can I convert a String type (numChildren) into an Int via init(with coder). Please look at the sample struct below struct Person: Codable { let firstName: String let lastName: String var numChildren: String init(with coder: Decoder) throws { let container = try decoder.container(keyedBy: CodingKeys.self) let firstName = try container.decode(String.self, .firstName) let lastName = ... let numChildren = try container.decode(String.self, .numChildren (what should be done after the above line? Thanks for your help.) } private enum CodingKeys: String, CodingKey { case firstName = "first_Name" case lastName = "last_Name" case numChildren }