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</source>These powerful features can be useful and efficient. Unfortunately, lists <u>cannot</u> perform these operations, unless we have to convert the lists into sets. In order to that, you should first perform a comparison, then convert the list to a set.<br><br>There are two problems with performing the above-mentioned technique:::::*Sets are '''un-ordered''' so if the list order is important this will cause problems and remove order::::*Sets '''cannot contain duplicate values''', if the list contains any duplicate values they will be deleted.

:There are two problems with performing the above-mentioned technique:::*Sets are '''un-ordered''' so if the list order is important this will cause problems and remove order::*Sets '''cannot contain duplicate values''', if the list contains any duplicate values they will be deleted. :However, if the list does not have any of the above requirements this is a great solution to some problems.