Swift - Loops
Why does
stride(from: 1, to: 10, by: 3) exclude 10, but stride(from: 1, through: 10, by: 3) might include it?Why does stride(from: 1, to: 10, by: 3) exclude 10, but stride(from: 1, through: 10, by: 3) might include it?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand 'to' vs 'through'
'to' creates a sequence up to but not including the end value. 'through' includes the end value if the step lands exactly on it.Step 2: Apply to example
With step 3 from 1: values are 1,4,7,10. Using 'to' excludes 10, using 'through' includes 10 because 10 is reached exactly.Final Answer:
'to' excludes end, 'through' includes end if step lands exactly -> Option DQuick Check:
'to' excludes, 'through' includes end = C [OK]
Quick Trick: Remember 'to' excludes end, 'through' includes end if exact [OK]
Common Mistakes:
- Mixing up 'to' and 'through' behavior
- Assuming both always include or exclude end
- Ignoring step alignment with end value
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