What methods can be used to implement and use Optional in your practice?

In iOS (Swift), Optional is a type that can contain a value or nil. Main methods of working with Optional:

• Declaration:

  var name: String? = "Ivan"
  

• Safe unwrapping:

  • if let or guard let for safe access:

  if let unwrappedName = name {
      print(unwrappedName)
  }
  

• Forced unwrapping:

  print(name!) // risky if name == nil
  

• Nil-coalescing operator:

  let displayName = name ?? "Guest"
  

• Optional chaining:

  let count = name?.count
  

In practice, Optional helps avoid errors with nil and makes code safer and clearer.