Let's start to see how we can use numbers and also
operations on numbers with Python. So this will
help us when we start to work with variables. So
as you have seen if I just type 2, okay, 2 is
evaluated to 2, and is printed, so you can see
the number 2. So you can use the round numbers
in Python, okay, 2, 4, you can also use
negative number -3, etc. You can also
make computations, for example, 4 + 5,
okay, we can add a space for clarity. And you can
see 4 + 5 is evaluated to 9. Okay, you
can also 7 - 5, like this is evaluated
to 2. Okay, multiplication is also working and
division. 6 / 2 is equal to 3. As
you can see here we have 3.0. Okay, we can also
use float numbers, so let's say 3.14.
Okay, you can see 3.14, if I so if I
just write 2, I get 2 like this as a round
number if I write 2.0, okay, I guess 2.0 as a
float number. And you can also use any kind of
computation on float number let's say 2.5 plus
3.4, which is equal to 5.9. Okay, you can combine
operations, let's say 4 + 5 * 2,
and you can see this is 14. And now I can
also add parentheses to change the other, okay,
* 2, 18. Okay. In this case, here, the
multiplication has the priority so it will compute
10, okay, and add 4. In this case because we
have parentheses then the addition has the
priority so it will compute 9 and then multiply
by 2. So well, if you know basic math
operations, you can see that working with numbers
is not difficult at all.