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Membership Operators in Python

Here, we are going to implement a python program to find square and cube of a given number by creating functions.
Submitted by IncludeHelp, on August 13, 2018

Membership Operators are the operators, which are used to check whether a value/variable exists in the sequence like string, list, tuples, sets, dictionary or not.

These operator returns either True or False, if a value/variable found in the list, its returns True otherwise it returns False.

Python Membership Operators

Operator	Description	Example
in	It returns True, if a variable/value found in the sequence.	10 in list1
not in	It returns True, if a variable/value does not found in the sequence.	10 not in list1

Example:

# Python example of "in" and "not in" Operators

# declare a list and a string
str1 = "Hello world"
list1 = [10, 20, 30, 40, 50]

# Check 'w' (capital exists in the str1 or not 
if 'w' in str1:
	print "Yes! w found in ", str1
else:
	print "No! w does not  found in " , str1

# check 'X' (capital) exists in the str1 or not
if 'X' not in str1:
	print "yes! X does not exist in ", str1
else:
	print "No!  X exists in ", str1

# check 30 exists in the list1 or not 
if 30 in list1:
	print "Yes! 30 found in ", list1
else:
	print "No! 30 does not found in ", list1

# check 90 exists in the list1 or not
if 90 not in list1:
	print "Yes! 90 does not exist in ", list1
else:
	print "No! 90 exists in ", list1

Output

    Yes! w found in  Hello world
    yes! X does not exist in  Hello world
    Yes! 30 found in  [10, 20, 30, 40, 50]
    Yes! 90 does not exist in  [10, 20, 30, 40, 50]