How to read Standard Input in Swift?

To read standard input in swift we will need to use readLine() function.

Function

readLine(strippingNewline:)

Returns a string read from standard input through the end of the current line or until EOF is reached.

Declaration

func readLine(strippingNewline: Bool = true) -> String?

Reading String

let string_input = readLine()
if let string_input = string_input {
    print(string_input) 
}

Reading Int

let number_input = Int(readLine()!)
if let number_input = number_input {
    print(number_input)
}

Reading Float

let number_input = Float(readLine()!)
if let number_input = number_input {
    print(number_input)
}

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