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Welcome back.

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When we talked about lists, we saw our special type of nun where some methods that worked on lists

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didn't really produce anything, they modified the lists in place.

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But the output of whatever they were doing was this thing.

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Nun Remember how we had in the output this nun?

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What does that mean?

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If you remember, I mentioned none as a special data type that exists in Python and most languages have

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something like this to represent the absence of value in some other languages.

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You might have heard of NULL, which is another thing that, again, represents the absence of value.

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Now, why is this useful?

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Well, for now, it's hard to really conceptualize it.

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We'll see it being used a lot more as we get further into the course.

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But I could do something like A equals none.

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Let's say, for example, we're just starting a video game.

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And in this video game, we have a user's weapons.

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But when you're just starting the game, there are no weapons that the user has.

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Well, in that case, we might want to assign the variable weapons.

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Maybe in our code we use this variable.

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But we also want to know that this user doesn't really have any weapons.

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It's not.

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So this is completely valid.

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Python.

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If I run this.

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I get none and we'll explore this a little bit more throughout the course, like I said, but hopefully

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this way you're not intimidated when you see it as the name suggests, it's just nothing.