What is "not in" operator in Python?

In Python, 'not in' membership operator evaluates to true if it does not finds a variable in the specified sequence and false otherwise. For example

>>> a = 10
>>> b = 4
>>> l1 = [1,2,3,4,5]
>>> a not in l1
True
>>> b not in l1
False

Since 'a' doesn't belong to l1, a not in b returns True. However, b can be found in l1, hence b not in l1 returns False

Pythonic

Updated on: 09-Sep-2023

>> a = 10 >>> b = 4 >>> l1 = [1,2,3,4,5] >>> a not in l1 True >>> b not in l1 False Since 'a' doesn't belong to l1, a not in b returns True. However, ','sharer','toolbar=0,status=0,width=580,height=325');" href="javascript: void(0)" title="Share on Facebook"> >> a = 10 >>> b = 4 >>> l1 = [1,2,3,4,5] >>> a not in l1 True >>> b not in l1 False Since 'a' doesn't belong to l1, a not in b returns True. However, ','sharer','toolbar=0,status=0,width=580,height=325');" href="javascript: void(0)" title="Share on LinkedIn">

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