Find Duplicates in List||Python program

Python provides a built-in function set(). The set() is the collection of unordered items. Each element in the set must be unique, immutable, and the sets remove the duplicate elements. Sets are mutable which means we can modify them after their creation.Using set() + len() Function
len() is a built-in function in Python. You can use the len() to get the length of the given string, array, list, tuple, dictionary, etc
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