3.1.6.6 Operations on lists | in, not in

The in and not in operators

Python offers two very powerful operators, able to look through the list in order to check whether a specific value is stored inside the list or not.

These operators are:

elem in myList elem not in myList

The first of them (in) checks if a given element (its left argument) is currently stored somewhere inside the list (the right argument) - the operator returns True in this case.

The second (not in) checks if a given element (its left argument) is absent in a list - the operator returns True in this case.

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Look at the code in the editor. The snippet shows both operators in action. Can you guess its output? Run the program to check if you were right.

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myList = [0, 3, 12, 8, 2]

print(5 in myList)

print(5 not in myList)

print(12 in myList)

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