When should I compare an optional value to nil?

Question

Quite often, you need to write code such as the following:

if someOptional != nil {
    // do something with the unwrapped someOptional e.g.       
    someF         


        

Answer 1

We can use optional binding.

var x:Int?

if let y = x {
  // x was not nil, and its value is now stored in y
}
else {
  // x was nil
}