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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.

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But I want you to just know that it's out there and that is there's actually an extra data type that

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I did and talk about.

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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 really

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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 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.

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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 and there's actually an action

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or function that we can use in Python called Ben for binary and you can see that a bean returns the

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binary representation of an integer.

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So it's going to return whatever the binary version of 5 is if I click Run here while I have to print

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remember.

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So let's print and click Run and I get the binary representation.

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Now instead of all zeros and ones there's also this idea of B and that is what Python uses underneath

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the hood to say a when I see this number with zero B that's a binary number.

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But if I Google binary number five I see that the binary number for 5 is 1 0 1 which again that's what

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we see here so that's really cool.

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Really interesting just to know that it exists by the way.

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Just for fun let's say that we want to return this into a decimal let's say where the computer and we

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just retrieve this binary number I can do it and then wrap this 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 is what

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us humans use.

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So if I actually do print here and click Run well actually we have to do base to here.

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Right because what we're saying is hey this number is base 2 and convert it to integer and base to number

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is while zeros and 1 it's a binary number.

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So if I click right here 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 when

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a computer retrieves that number.

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Let's say we're do some addition.

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Well it's going to grab this for 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 in beginner courses and especially so early

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in the course.

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

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

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for you 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 by.