7. Membership Operators

  • Membership operators are used to test whether specific value or item is present is a sequence or a collection of items. There are two membership operators in python. They are 'in' , 'not in'. These operators are generally used with Strings, Lists, Tuples, Sets and Dictionaries to check for the existence of values.

Operator

Description

Example

     in

Returns True if specific value is present in a sequence or a collection. Otherwise, it returns False.

X=[1,2,3]

2 in X - True

10 in X  - False 

    not in

Returns True if specific value is not present in a sequence or a collection. Otherwise, it returns False.

Y=(1,2,3)

8 not in Y - True

2 not in Y - False