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Welcome back.

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This is a quick optional video that, well, with something that you probably won't use, but I want

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you to just know that it's out there and that is there's actually an extra data type that I didn't talk

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about, and it's called complex.

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And as the name suggests, it's pretty complex.

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However, a complex number, again, is a number that is a third type instead of int and float.

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We also have this type four numbers.

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Now, the reason I'm not really teaching complex is that you only use this if you're doing something

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really, really complex math.

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Most of the time you'll never use it.

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I personally have never used it, but it is good to know that it exists.

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It's the equivalent to a real number.

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And you can read about complex numbers if you want.

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But again, that's something that you don't need to worry ninety nine point nine percent of the time.

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Another thing I want to talk to you about is this idea that these integers and floats get stored such

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as five in memory as binary, that is as binary numbers, ones and zeros.

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And there's actually an action or function that we can use in Python called Behn for binary.

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And you can see that a bin returns the binary representation of an integer.

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So it's going to return whatever the binary version of five is, if I click run here.

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Well, I have to print, remember?

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So let's print.

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And click run.

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And I get the binary representation now instead of all zeros and ones, there's also this idea of B

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and that is what Python uses underneath the hood to say, hey, when I see this number with zero B.

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That's a binary number.

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But if I Google binary number five.

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I see that the binary number four five is one on one, which, again, that's what we see here.

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So that's really cool, really interesting just to know that it exists.

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By the way, just for fun, let's say that we want to turn this into a decimal, let's say where the

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computer and we just retrieve this binary number.

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I can do it and then wrap this.

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Like this in single or double quotes?

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And then with the end, I can also say, hey, I want this return to a number that is base 10, which

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is what us humans use.

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So if I actually do print here.

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And click, Ron.

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Well, actually, we have to do base two here, right, because what we're saying is, hey, this number

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is base two and convert it to integer and base to number is, well, zeros and one, it's a binary number.

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So if I click on here.

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Look at that, I get five.

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So in your head, you can think of it this way when we story number like five, an integer like five,

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when a computer retrieves that number, let's say we're doing some additions.

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Well, it's going to grab this from memory.

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It's going to say, well, this is a binary number and I'm going to convert it into integer.

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Very, very cool.

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Now, the reason I taught this here, you won't see this a lot and beginner courses and especially so

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early in the course.

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But I think it's an important principle, although you might not get tested on this ever for you to

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just understand how things are working underneath the hood, I believe is an important thing for you

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to do in order to become a great developer.

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So hopefully this doesn't confuse you too much.

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I'll see you in the next video.

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Bye bye.