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Why does Swift require an explicit fallthrough statement in switch cases instead of implicit fallthrough like some other languages?

easy📝 Conceptual Q11 of 15
Swift - Control Flow
Why does Swift require an explicit fallthrough statement in switch cases instead of implicit fallthrough like some other languages?
ABecause implicit fallthrough causes syntax errors in Swift
BBecause Swift does not support switch statements
CTo make switch statements run faster
DTo prevent accidental execution of multiple cases and improve code clarity
Step-by-Step Solution
Solution:

  1. Step 1: Understand implicit fallthrough behavior

    In some languages, switch cases automatically continue to the next case unless stopped.

  2. Step 2: Swift's design choice

    Swift requires explicit fallthrough to avoid accidental case execution and make code clearer.

  3. Final Answer:

    To prevent accidental execution of multiple cases and improve code clarity -> Option D

  4. Quick Check:

    Explicit fallthrough = clarity and safety [OK]
Quick Trick: Remember: Swift needs explicit fallthrough to avoid mistakes [OK]
Common Mistakes:
  • Thinking Swift switch always falls through automatically
  • Believing fallthrough is not allowed in Swift
  • Confusing fallthrough with break statements

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