Swift - Loops
What happens if you try to change an array inside a Swift
for-in loop iterating over it?What happens if you try to change an array inside a Swift for-in loop iterating over it?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall Swift's compile-time safety checks
Swift checks for unsafe mutations during loops before running the program.Step 2: Identify the error type
Trying to modify the array inside the loop causes a compile-time error, stopping unsafe code.Final Answer:
Swift prevents the change and shows a compile-time error -> Option AQuick Check:
Swift loop mutation = Compile-time error [OK]
Quick Trick: Swift stops unsafe changes before running code [OK]
Common Mistakes:
- Assuming runtime crashes instead of compile errors
- Believing arrays change silently during loops
- Thinking loops skip changed elements automatically
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