如何查看状态码是否为200?

How to check the status code is whether 200 or not?

如何检查状态码是否为 200。我想用 swift 语言

session.dataTask(with: request){(data,response,error) in

            if let  response = response {
               print(response)

             }
           }
let statusCode: Int? = {
    if let httpUrlResponse = response as? HTTPURLResponse {
        return httpUrlResponse.statusCode
    }
    return nil
}()

然后与200比较