HackerRank Input Reading Arrays of Ints or Doubles Stdin swift

HackerRank-Input-Reading-Stdin.swift

//Reading an Int
let number = Int(readLine()!)!

//Reading a Double
let decimalNumber = Double(readLine()!)!

//Reading a string
let text = readLine()!

//reading an array of Ints

guard let intTemp = readLine() else { fatalError("Bad input") }
let intArray: [Int] = intTemp.split(separator: " ").map {
    if let intItem = Int($0.trimmingCharacters(in: .whitespacesAndNewlines)) {
        return intItem
    } else { fatalError("Bad input") }
}

//reading an array of Doubles

guard let doubleTemp = readLine() else { fatalError("Bad input") }
let doubleArray: [Double] = doubleTemp.split(separator: " ").map {
    if let doubleItem = Double($0.trimmingCharacters(in: .whitespacesAndNewlines)) {
        return doubleItem
    } else { fatalError("Bad input") }
}