hash map vs hash set

A hash map is a data structure that stores key-value pairs, where each key is unique and maps to a specific value. It uses a hash function to efficiently retrieve values based on their keys. On the other hand, a hash set is a data structure that stores a collection of unique elements. It also uses a hash function, but only stores the keys (without any associated values). In summary, the main difference between a hash map and a hash set is that a hash map stores key-value pairs, while a hash set only stores unique keys. Both data structures use a hash function for efficient retrieval, but their purpose and the way they store data differ.

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