3.4.1 Element Uniqueness in Sets

The defining feature of a set is uniqueness.
Each element in a set appears only once.

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Uniqueness Behavior

• Duplicate elements are automatically removed
• The order of elements is not preserved
• Sets only store hashable elements

This behavior makes sets useful for eliminating duplicates.

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Common Use Cases

• Removing duplicate values from data
• Tracking unique items
• Performing membership checks

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📌 Note:
Sets do not support indexing because they are unordered.