let url = URL(string: "https://httpbin.org/get")!
let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
    if let error = error {
        print("error: \(error)")
    } else {
        if let response = response as? HTTPURLResponse {
            print("statusCode: \(response.statusCode)")
        }
        if let data = data, let dataString = String(data: data, encoding: .utf8) {
            print("data: \(dataString)")
        }
    }
}
task.resume()

let url = URL(string: "https://httpbin.org/post")!
var request = URLRequest(url: url)
request.httpMethod = "POST"
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
    if let error = error {
        print("error: \(error)")
    } else {
        if let response = response as? HTTPURLResponse {
            print("statusCode: \(response.statusCode)")
        }
        if let data = data, let dataString = String(data: data, encoding: .utf8) {
            print("data: \(dataString)")
        }
    }
}
task.resume()

Apple Swift version 4.2 (swiftlang-1000.11.37.1 clang-1000.11.45.1)
Target: x86_64-apple-darwin18.2.0