Membership operators are used to test if a sequence is presented in an object:
Returns True if a sequence with the specified value is present in the object x in y Try it » not in Returns True if a sequence with the specified value is not present in the object x not in y Try it »
Check if "banana" is present in a list: fruits = ["apple", "banana", "cherry"]
print("banana" in fruits)Check if "pineapple" is NOT present in a list: fruits = ["apple", "banana", "cherry"]
print("pineapple" not in fruits)The membership operators also work with strings:
Example text = "Hello World"
print("H" in text)
print("hello" in text)
print("z" not in text)