print("Hello World!")
let http404Error = (404, "Not Found")
let (justTheStatusCode, _) = http404Error
print("The status code is \(justTheStatusCode)")
print("The status message is \(http404Error.1)")
let http200Status = (statusCode: 200, description: "OK")
print("The status code is \(http200Status.statusCode)")
print("The status message is \(http200Status.description)")
let possibleNumber = "123"
let convertedNumber = Int(possibleNumber)
var serverResponseCode: Int? = 404
serverResponseCode = nil
var surveyAnswer: String?
if convertedNumber != nil {
print("convertedNumber contains some integer value.")
}
if let actualNumber = Int(possibleNumber) {
print("The string \"\(possibleNumber)\" has an integer value of \(actualNumber)")
} else {
print("The string \"\(possibleNumber)\" could not be converted to an integer")
}
if let firstNumber = Int("4"), let secondNumber = Int("42"), firstNumber < secondNumber && secondNumber < 100 {
print("\(firstNumber) < \(secondNumber) < 100")
}
