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Let's start to see how we can use numbers and also

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operations on numbers with Python. So this will

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help us when we start to work with variables. So

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as you have seen if I just type 2, okay, 2 is

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evaluated  to 2, and is printed, so you can see

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the number 2. So you can use the round numbers

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in Python, okay, 2, 4, you can also use

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negative number -3, etc. You can also

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make computations, for example, 4 + 5,

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okay, we can add a space for clarity. And you can

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see 4 + 5 is evaluated to 9. Okay, you

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can also 7 - 5, like this is evaluated

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to 2. Okay, multiplication is also working and

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division. 6 / 2 is equal to 3. As

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you can see here we have 3.0. Okay, we can also

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use float numbers, so let's say 3.14.

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Okay, you can see 3.14, if I so if I

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just write 2, I get 2 like this as a round

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number if I write 2.0, okay, I guess 2.0 as a

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float number. And you can also use any kind of

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computation on float number let's say 2.5 plus

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3.4, which is equal to 5.9. Okay, you can combine

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operations, let's say 4 + 5 * 2,

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and you can see this is 14. And now I can

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also add parentheses to change the other, okay,

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* 2, 18. Okay. In this case, here, the

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multiplication has the priority so it will compute

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10, okay, and add 4. In this case because we

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have parentheses then the addition has the

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priority so it will compute 9 and then multiply

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by 2. So well, if you know basic math

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operations, you can see that working with numbers

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is not difficult at all.