Inclusion Operators

Inclusion operators are used to check if a value/object is in a collection and return boolean values.

in

The in operator returns a True if the left value/object is in the collection on the right and False if it is not:

print(1 in [0, 1, 2, 3])

True

print('a' in 'abc')

True

print(2.4 in [1, 2, 3])

False

not in

The not in operator returns the converse of the in operator:

print('a' not in 'abc')

False

print(7 not in [1, 2, 3, 4, 5])

True