Web Reference: Dec 20, 2025 · Explanation: This code initializes an empty set a, then adds 's' and 'e' using the add () method. Since sets store only unique values, adding 's' again has no effect, ensuring each element appears only once. Here is a friendly, detailed explanation of the common misunderstandings, the reasons behind this design, and how to achieve similar results using alternative methods and sample code Definition and Usage The add() method adds an element to the set. If the element already exists, the add() method does not add the element.
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