Iphone or iPad you need to install a couple of other things first so you go
to the App Store and search for Pycharm. Then in the App Store click on
the install button. Now. Once Pycharm is installed, you can open it up by
clicking on this icon. Here in your downloads folder. You should also have
a.py file. So let's open that up now. The first thing you 're going to do is
create a new project so let's do that by clicking on this green plus sign
here in your project explorer window and type in Python. This is the name
of your project. Now let's choose a location for your project so we're
going to choose a folder on our computer called projects and then click
on the create Button Now let's change some settings inside of Pycharm.
So first thing you 're going to. To want to do is change the language of
your project to Python, So inside of pycharm. Go to File > Settings >
Project Settings and in the Languages section change Python to the
language of your project. Now next thing you 're going to want to do is
set up your project folder so inside of pycharm go to File > Settings >
Project Structure and in the Project Folder section click on the Browse
button and then select the folder where you want your project files to live
so now Your project is set up and ready to go all right let's start writing
some code. We're going to start with the simplest code possible and
that's a hello world program. In Python. A Hello world program is simply a
program that prints out hello world so let's open up our.py file and enter
this code here. Here import sys [UNK] world!") all right so we've imported
the Sys module and then we've printed out [UNK] world!" now Let's save
our file by clicking on this green button here in your editor window and
call it Hello.py now let's run our program by clicking on this green run
button here inside of pycharm and you'll see that our program has
printed out [UNK] world!" all right that's our first simple code block in
Python now Let's take a look at some more code blocks in Python. First
thing we'll want to do is create a variable, so let's open up our hello.py
file again and enter this code def [UNK] [UNK] world!") all right so we've
defined a function called say —hello() and inside of say —hello() we're
going to print out [UNK] world!" now let's save our file once again say we
want to declare a variable called price. We would type price and then
after we type the name of the variable. We would put a colon and then
the value of that variable. So in this case, the value of this variable will
be 12.99. So we can use this variable anywhere inside our Python code
now let's say we want to print the value of this variable. We can do that
by simply writing print price and then after that we would put a period
and then the value of the variable. So in this case the code would print
out 12.99 alright. Now let 's say we wanted to change the value of this
variable. We can do that by simply typing new value for price and then
after that we would type a colon and then the new value of the variable.
So in this case the code would print out 13.00 alright. Now let's say we
wanted to delete this variable. We can do that by simply typing delete
price and then after that we would type a period and then hit enter so In
this case, the code would delete the variable called price Alright. Now
, let's talk about lists. Let's say we have a list of items and we want to
display. each item in turn on our application window so to do that we
need to use a for loop so to declare a for loop. We would type for item in
list, and then after that we would type parenthesis, then the list item and
then after that hit enter so In this case, the code would run for each item
in the list called list and then it would go inside the parentheses and it
would assign the item inside those parentheses to the variable called
item. So in this case, the code would print out apple Banana cherry
pineapple, so you can see how this works if you wanted to change what
was inside those parentheses. You could do that by simply typing
different values for parenthesis. So in this case, I typed apple Banana
cherry pineapple. So now you understand how to use a for loop alright.
Now last but not least let's talk about functions. Functions are blocks of
code that you can use in your python programs to simplify your code or
to make it more powerful. You can think of functions as mini-programs
inside your python program, So you can see here is a function called
square which is just a simple function that takes one parameter which is
called a number, and it returns the square of that number. Okay now let's
say we wanted to call this function inside our for loop so to do that we
would type square(12.99) inside our for loop and after that hit enter so.
In this case the code would run and it declare and use variables in
python.
You run the program and you get this message. The age of John Smith is
1990 okay. So this is how we can use the input function in Python to read
a value from the user now. In addition to reading values from the user,
we also have the ability to write values to the user. So let me show you
how we do that so we first create a variable called message and set it to
the string 'please enter your message' now we use the print function to
print our message on the terminal window so you can see it here now.
Let's run our program and see what happens so please enter your
message so we get this message now. What we want to do is display this
message for as long as the user remains in our program. So we use the
while loop so we type while True which means while the condition is True.
So In this case the condition is that our message variable is not empty
and that 's why we put a comma after while because that 's what tells
Python to keep looping while this condition is met okay now if you type
exit out of our program right now you will get an error message because
our while loop condition is not met Okay. So now let's add a counter to
our program. So we can keep track of how many times our while loop
condition has been met. So we add a variable called counter and set it to
1. Now if you run our program again and type exit out. of it, you will see
that our while loop condition has been met four times. Now Let's add
another counter and set it to 2 now. If you run our program again and
type exit out of it. You will see that our while loop condition has been met
six times now let's add another counter and set it to 3. Now If you run our
to the App Store and search for Pycharm. Then in the App Store click on
the install button. Now. Once Pycharm is installed, you can open it up by
clicking on this icon. Here in your downloads folder. You should also have
a.py file. So let's open that up now. The first thing you 're going to do is
create a new project so let's do that by clicking on this green plus sign
here in your project explorer window and type in Python. This is the name
of your project. Now let's choose a location for your project so we're
going to choose a folder on our computer called projects and then click
on the create Button Now let's change some settings inside of Pycharm.
So first thing you 're going to. To want to do is change the language of
your project to Python, So inside of pycharm. Go to File > Settings >
Project Settings and in the Languages section change Python to the
language of your project. Now next thing you 're going to want to do is
set up your project folder so inside of pycharm go to File > Settings >
Project Structure and in the Project Folder section click on the Browse
button and then select the folder where you want your project files to live
so now Your project is set up and ready to go all right let's start writing
some code. We're going to start with the simplest code possible and
that's a hello world program. In Python. A Hello world program is simply a
program that prints out hello world so let's open up our.py file and enter
this code here. Here import sys [UNK] world!") all right so we've imported
the Sys module and then we've printed out [UNK] world!" now Let's save
our file by clicking on this green button here in your editor window and
call it Hello.py now let's run our program by clicking on this green run
button here inside of pycharm and you'll see that our program has
printed out [UNK] world!" all right that's our first simple code block in
Python now Let's take a look at some more code blocks in Python. First
thing we'll want to do is create a variable, so let's open up our hello.py
file again and enter this code def [UNK] [UNK] world!") all right so we've
defined a function called say —hello() and inside of say —hello() we're
going to print out [UNK] world!" now let's save our file once again say we
want to declare a variable called price. We would type price and then
after we type the name of the variable. We would put a colon and then
the value of that variable. So in this case, the value of this variable will
be 12.99. So we can use this variable anywhere inside our Python code
now let's say we want to print the value of this variable. We can do that
by simply writing print price and then after that we would put a period
and then the value of the variable. So in this case the code would print
out 12.99 alright. Now let 's say we wanted to change the value of this
variable. We can do that by simply typing new value for price and then
after that we would type a colon and then the new value of the variable.
So in this case the code would print out 13.00 alright. Now let's say we
wanted to delete this variable. We can do that by simply typing delete
price and then after that we would type a period and then hit enter so In
this case, the code would delete the variable called price Alright. Now
, let's talk about lists. Let's say we have a list of items and we want to
display. each item in turn on our application window so to do that we
need to use a for loop so to declare a for loop. We would type for item in
list, and then after that we would type parenthesis, then the list item and
then after that hit enter so In this case, the code would run for each item
in the list called list and then it would go inside the parentheses and it
would assign the item inside those parentheses to the variable called
item. So in this case, the code would print out apple Banana cherry
pineapple, so you can see how this works if you wanted to change what
was inside those parentheses. You could do that by simply typing
different values for parenthesis. So in this case, I typed apple Banana
cherry pineapple. So now you understand how to use a for loop alright.
Now last but not least let's talk about functions. Functions are blocks of
code that you can use in your python programs to simplify your code or
to make it more powerful. You can think of functions as mini-programs
inside your python program, So you can see here is a function called
square which is just a simple function that takes one parameter which is
called a number, and it returns the square of that number. Okay now let's
say we wanted to call this function inside our for loop so to do that we
would type square(12.99) inside our for loop and after that hit enter so.
In this case the code would run and it declare and use variables in
python.
You run the program and you get this message. The age of John Smith is
1990 okay. So this is how we can use the input function in Python to read
a value from the user now. In addition to reading values from the user,
we also have the ability to write values to the user. So let me show you
how we do that so we first create a variable called message and set it to
the string 'please enter your message' now we use the print function to
print our message on the terminal window so you can see it here now.
Let's run our program and see what happens so please enter your
message so we get this message now. What we want to do is display this
message for as long as the user remains in our program. So we use the
while loop so we type while True which means while the condition is True.
So In this case the condition is that our message variable is not empty
and that 's why we put a comma after while because that 's what tells
Python to keep looping while this condition is met okay now if you type
exit out of our program right now you will get an error message because
our while loop condition is not met Okay. So now let's add a counter to
our program. So we can keep track of how many times our while loop
condition has been met. So we add a variable called counter and set it to
1. Now if you run our program again and type exit out. of it, you will see
that our while loop condition has been met four times. Now Let's add
another counter and set it to 2 now. If you run our program again and
type exit out of it. You will see that our while loop condition has been met
six times now let's add another counter and set it to 3. Now If you run our
