Python: How to Check If Element is or not in List

Let's see some examples to demonstrate how to check If an element is or is not in the List.

Example 1:

numbers = [1, 5, 2, 3, 9]

if 2 in numbers:
    print("2 is present in the list")
else:
    print("2 is not present in the list")

if 6 in numbers:
    print("6 is present in the list")
else:
    print("6 is not present in the list")

Output:

2 is present in the list
6 is not present in the list

Let's see another example with a list of strings

cities = ['London', 'Paris', 'Tokyo', 'New York', 'Sydney']

check_element_1 = 'Paris'
check_element_2 = 'Rome'


if check_element_1 in cities:
    print(f"{check_element_1} is present in the list of cities")
else:
    print("{check_element_1} is not present in the list of cities")

if check_element_2 in cities:
    print(f"{check_element_2} is present in the list of cities")
else:
    print(f"{check_element_2} is not present in the list of cities")

Output:

Paris is present in the list of cities
Rome is not present in the list of cities