readLine ()

Question

Hi all!

I have some Questions see code :

1. if input is Hello
results are :
English:Optional("Hello")
Alien:Optional("olleH")
But Why are Optionals there???

2. Input leaving empty --> Result are:
English:Optional("")
Alien:Optional("")
why Else Condition doesn't work???

3. see line : var Output:String? = String(Input!.reversed()).
It is working only if I Add "!" after Input. but Theoretically it it already wrapped up ? isn't it?

Tank you !

J.

CODE:
var Input:String? = readLine()

if let ActualInput = Input {
print("English:\(Input)")
}else {
("no solution")
}
var Output:String? = String(Input!.reversed()).

if let ActualOutput = Output{
print ("Alien:\(Output)")
}else {
print ("no solution")
}

results: Why are Optionals there???
English:Optional("Hello")
Alien:Optional("olleH")

Answer 1

i solved it :)