Python for Beginners - Learn Coding with Python in 1 Hour

in this python tutorial you're going to

learn everything you need to know to

start programming in python if you want

to learn python programming for data

science machine learning or web

development this python tutorial is the

perfect place to learn python you don't

need any prior knowledge in python or

programming in general i'm going to

teach you everything from scratch i'm

mosh hamadani and i've taught millions

of people how to code through this

channel if you're new here make sure to

subscribe as i upload new videos every

week now let's jump in and get started

all right before we get started let me

give you some ideas about what you can

do with python that's a very common

question python is a multi-purpose

programming language so you can use it

for a variety of different tasks you can

use python for machine learning and ai

in fact python is the number one

language for machine learning and data

science projects python is also very

popular in web development using python

and a framework called django you can

build amazing websites here are five

websites powered with python and django

youtube instagram spotify dropbox and

pinterest you can also use python in

automation with python you can save your

time and increase your productivity by

automating repetitive tasks so why are

you learning python are you learning it

for automation for data science or web

development let me know in the comment

section below

all right the first thing i want you to

do is to head over to python.org to

download the latest version of python so

you go to downloads and select the

latest version of python

here in your downloads folder you should

see this package simply double click it

you're going to see this python

installer if you're on windows you will

see this checkbox over here add python

to path make sure to check it it's

really important otherwise you're not

going to be able to follow this tutorial

simply click on continue

again

one more time

i agree with the terms

and install the latest version of python

now here you need to enter the username

password of your computer

so

let's do that real quick

next you need to install a code editor

we use a code editor to write our code

and execute it the most popular code

editor for python is pycharm you can get

it from jetbrains.com

pycharm

so on this page

click on download

you should see two different editions

one is the professional edition which is

commercial and we also have this

community edition which is free and open

source so we're going to download the

community edition

now in your downloads folder you should

have this package let's double click it

if you're on windows you're going to see

an installation wizard so simply click

on the next button until you install

pycharm if you're on a mac you need to

drag this pycharm and drop it onto the

applications folder

now

let's open it

the first time you open pycharm you have

to configure a few settings we don't

want to spend time on this so over here

we're going to click on skip remaining

and set defaults

now let's create a new project

over here we can specify the location

and the name of our python project so

let's append hello world to this path

this is where our python project is

going to be saved so let's click on

create

in this window you can see the content

of our project so here's our hello world

project currently we have only one

folder inside this project that is vn

which is short for virtual environment

we'll talk about virtual environments in

the future so currently we don't have

any python files inside this project a

real application can consist of tens or

hundreds or even thousands of python

files so let's right click on the

project name

and go to new python file we're going to

call this file up

now we can collapse this project window

by clicking on this icon so now we have

more space let's write our first python

code we're going to write print all in

lowercase then add parentheses

then add quotes either single quotes or

double quotes

and inside this code we're going to

write hello world

so this is what we call a string a

string means a string or sequence of

characters in simple words that means

textual data so in python and in many

other programming languages whenever

we're dealing with textual data we

should always surround our text with

quotes

in python we can use single or double

quotes

now this print you see here is a

function built into python and we can

use it to print a message on our

application window so let me show you

how to run this code

on the top we go to the run menu and

then select run

note that there is a shortcut associated

with this command i always use shortcuts

because they increase my productivity so

let's click on this

now select app

and over here

you can see this little window this is

what we call the terminal window and it

shows the output of our program

so here's the hello world message

printed in the terminal window now as

you learn more python you will learn how

to build applications that have a

graphical user interface that's an

advanced topic so for now let's not

worry about it

alright now let's talk about variables

we use variables to temporarily store

data in a computer's memory for example

we can store the price of a product or

someone's name their email their age and

so on let me show you so

to declare a variable we start by typing

a name for that variable let's say age

then we add an equal sign

and then we type a value let's say 20.

so with this we're storing the number 20

somewhere in our computer's memory and

we're attaching this age as a label for

that memory location so now we can read

the value at this memory location and

print it on the terminal so instead of

printing hello world we want to print

the value of the age variable

so i'm going to delete what we have

inside parenthesis

and type age note that i'm not adding

quotes because if i run this program

we'll see the text h on the terminal we

don't want that we want the value of the

age variable so let's remove the quote

and

print the value of the age variable

now here on the toolbar you can click on

this play icon to run your program or

you can use the shortcut that i showed

you in the last video so the shortcut is

over here on a mac that's ctrl shift and

r

so

there you go

now you can see the value of the age

variable

now we can also change the value of a

variable for example on line 2

we can set 8 to 30.

now when we run our program

we see 30. so as you can see our program

gets executed from top to bottom

so this is how we can declare and use a

variable now let's look at a few more

examples

so i'm going to declare

another variable called price