Welcome back. So were strings like S are sequences of characters, lists are a new kind of Python type which are sequences of any type of value, which can include other strings or lists. So lists are created by using square brackets. I start creating a list by using a left square bracket, and then I put my contents separated by commas. Here I'll make the first item actually be a string. I'll make the second item be an integer, and I'll make the third item be another string. When I print out my list, then I get back the items that I actually put into the list. Now just like strings, lists have an order and a length. In the case of this list my list, then I actually have three items. The first item is the string one, and then separating out every item is a comma. The second item is the integer two, separated by a comma again, and the third item is the string three. I would say that this list has length three. The first item being one, the second item being the integer two, the third item being the string three. Here are a few other examples of lists. Just like I can have an empty string, I can also have an empty list. This is a list with link zero. I can also have a list with one item. Here my list is a list with one item, and that one item is the integer 100. Now just like strings, this my list equals the list 100 is very different from creating an integer I equal to 100. Even though these looks similar us, to Python these are entirely different. Further, if I make S the string 100, then all three of these are entirely different things, because S is a string, my list is the list, and I is an integer. If I tried to do something like my list plus five, then I would get a run time error saying that we can only concatenate lists with other lists, because my list is a list, the only other thing that we can add to it is a list, as we'll talk about it in a later lesson. Until next time.