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Why are functions considered first-class citizens in Swift?

easy📝 Conceptual Q11 of 15
Swift - Functions
Why are functions considered first-class citizens in Swift?
ABecause functions can be assigned to variables and passed as arguments
BBecause functions cannot return values
CBecause functions must always be declared globally
DBecause functions cannot be nested inside other functions
Step-by-Step Solution
Solution:

  1. Step 1: Understand what first-class means in Swift

    First-class means functions can be treated like any other value, such as assigned to variables or passed around.

  2. Step 2: Identify the correct property of functions in Swift

    Swift allows functions to be stored in variables and passed as arguments, which matches the definition of first-class citizens.

  3. Final Answer:

    Because functions can be assigned to variables and passed as arguments -> Option A

  4. Quick Check:

    Functions as values = Because functions can be assigned to variables and passed as arguments [OK]
Quick Trick: Remember: first-class means functions act like normal values [OK]
Common Mistakes:
  • Thinking functions cannot be passed as arguments
  • Believing functions must be global only
  • Assuming functions cannot return values

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