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What does an Optional in Swift represent?

easy📝 Conceptual Q11 of 15
iOS Swift - Swift Language Essentials
What does an Optional in Swift represent?
var name: String?
AA special type of function.
BA variable that must always have a value.
CA constant that cannot be changed.
DA variable that can hold a value or no value (nil).
Step-by-Step Solution
Solution:
  1. Step 1: Understand Optional meaning

    An Optional type means the variable can hold a value or be nil (no value).
  2. Step 2: Analyze the example

    The declaration var name: String? means name can be a String or nil.
  3. Final Answer:

    A variable that can hold a value or no value (nil). -> Option D
  4. Quick Check:

    Optional = value or nil [OK]
Quick Trick: Optionals always mean value or nil, never guaranteed value [OK]
Common Mistakes:
  • Thinking Optional always has a value
  • Confusing Optional with constant
  • Assuming Optional is a function

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