Lists work … This is more efficient and can lead to 50% performance improvements in practical settings. Less than 4 will be filtered out. add (elem) method – This method adds a single element to a set object. [crayon-5ff9268c8b002418427257/] Output: Average of listOfIntegers: 3.0 Using reduce(), […] Instead, to add multiple elements to your list, you need to call the append() method multiple times. Python program to check if an array is monotonic or not . Remove and discard are used to delete a specific element from the set. 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