When you have a list of elements, there can be cases when you need to check whether there an element is part of a list or not.

You can do this using in checker.

Let us see this in action. Let us assume that we have a list and we want to check whether a number is part of that list.

 my_first_list = [1, 3, 5, 7, 9]
 ​
 print(50 in my_first_list)  # False

There is also not in which you can use to check whether an element is not part of a list.

Let us see this in action.

 my_first_list = [1, 3, 5, 7, 9]
 ​
 print(50 not in my_first_list)  # True

That’s basically it.

I hope you find it useful.