3.4.3 Sets vs Lists

Sets and lists are both used to store collections of data, but they serve different purposes.

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Key Differences

• Sets store unique elements; lists allow duplicates
• Sets are unordered; lists preserve order
• Sets do not support indexing; lists do
• Sets are optimized for membership tests

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When to Use Sets

• When uniqueness is required
• When checking membership frequently
• When performing set operations

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When to Use Lists

• When order matters
• When duplicates are allowed
• When indexed access is needed

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📌 Note:
Choosing the correct data structure improves performance and code clarity.