hi guys, today I’m going to present you

our third lesson of Python programming language our class will be about simple

calculation using Python programming language before I’m going to start my

class our class I would like to tell you that in Python programming language plus represents addition and – represents subtraction and forward slash represents

division and asterisk represents the multiplication so lets us you know give

you the example of all of that so first we go to the visual studio code okay

in our last class we have already you know created the Python course folder and

inside the Python course folder we have put the file Python file project 1 so let us

continue to you know creating our Python files and put it inside our Python

course folder to do that is simple just we click on the Python course and just

new file just my name it Python sorry project 2 dot py and we click enter

don’t forget to put py ok so lets us to start to write our code here we have the

file we just we have the first variable like for example give 2 the second

variable y is equal 4 the third value variable is Z is equal for example 8 so

let’s to give the our first example of of addition so we use a print function

here too to make to make it appear in the our

output so just write x plus y is the first function. in the second

function we we use a subtraction here Y minus X okay. the third the third

function we use like we’ll use division here

so print Z divided by for example Y okay

the last one we use multiplication X multiplied by z okay so we have you

know we just give like for example of the addition the subtraction sorry the

first example is about the addition the second example is of the subtraction. the

third example is of the division and the last one example of multiplication let’s

to execute my code simply just click on the right button and we choose after

that run Python file in terminal. see it works so X plus y equals 6.y minus X

equals 2 and Z divided by Y equals 2 point 0 .why 2 point 0 here

of course I have just told you why is 2 point 0 this means this the number is decimal

this means is decimal this means the number has point so why and why

after after I divided z by y the number became decimal here

because here in my in Python programming language I have a rule that whenever I

divide any number in python programming language the result will be float this

means will be decimal this means will be will be

will have a point okay okay the the last example is X multiplies it

X multiplies it is 16 X 2 and Z is 8 so this mean will become you know 16 okay

so let’s give another another example just right you know create another

project project 3 for example project 3 dot py I click enter here that’s 2 for

example to copy here okay we copy and we put it in project 3 ok ok so now I will

use the function print but inside the function print inside the parentheses I

will use all the operators like + – division and multiplication so all the

operators I will use so let’s do to start to write print here we have for example

X plus parentheses open parentheses and close parentheses and then inside it

I will put z multiply for example Y and outside parentheses I will use you

know division here just for example write X divided by X ok so in Python we have a you know we have a

rule that the calculation always will start inside

the parentheses inside here in our case with the calculation will start first in

z multiply y okay and in our case so the because you know thou always the

calculation was supposed to be started inside the parentheses so the calculation

who starts it multiply why after the the result of this calculation you know we

divided by X after divided by X the result of whole you know all whole the

calculation of open parentheses z multiply Y close parentheses divided by

X will be you know will be added with X okay

with the x so let’s now to to execute my code the project 3 run Python

file in terminal ok 18.0 why is float again because we use division so

correctly correct is 18 so everything now is fine okay okay thank you very

much this is the end of our video of the of all the third lesson see you on the

next video thank you very much

Thanks, very interesting