What is an optional in Swift?

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Tags

  1. #either
  2. #value
  3. #contains
  4. #indicate
  5. #represented
  6. #optionals
  7. #optional
  8. #might
  9. #together
  10. #these
  11. #values
  12. #documentation
  13. #apple
  14. #missing
  15. #swift