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In this section, you will learn about the different kinds of data you can work with in your Python

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programs.

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You will also learn how to use variables to represent data in your programs.

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So here we will.

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Write a simple code here, which is Hello world.

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Print.

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Hello, Oxley World.

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And here, let's take a closer look at what Python does when you run this script.

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As it turns out, Python does a fair amount of work even within the runs a simple program.

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So when you run this code, you should see this output.

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So when you run the our main.py file, the ending page here indicates that the file is a python program

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and your editor runs the file through the python interpreter which reads through the program and determines

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that what each word in the program means.

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For example, when the interpreter sees the word print here, when the interpreter sees the word print,

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followed by parentheses here.

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It prints to the screen whatever is inside the parentheses here.

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As you write your programs, your editor highlights different parts of your program in different ways.

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For example, it recognizes the print is the name of a function like this here and displays the word

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in one color.

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It recognizes that Hello world is not a python code here.

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And this place that fairs in different color.

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As you can see, it's green, it's purple here.

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So the feature is called syntax highlighting, and it's quite useful as you start to write your own

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programs.

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So let's get started with variables.

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So let's try using a variable in our main file and let's add a new line here.

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So we will message and here.

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Hello world.

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Here.

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And after that we will use print again.

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Print?

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Maybe if I raise them.

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Font size a little bit.

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So you can see better here.

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25.

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Okay, Nice.

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So now we're going to use print message.

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So now let's run this program again and see what's happening here.

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As you can see here, Hello world again.

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So we have added a variable name.

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And name the message, and every variable is connected to a value.

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Which is the information associated with that variable.

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In this case, the value is Hello World.

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This is the text.

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And adding a variable makes it a little more work for Python interpreter and when it processes the first

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line, it associates the variable message with the Hello World text.

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And when it reaches the second line, it prints the value associated with the message to the screen.

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Now let's expand on this program by modifying this file to print a second message.

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Here we will add a blank line to here and then we will add two new lines to the code.

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Now, message and here, Oxley.

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Python.

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Training.

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And or course.

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Right.

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And here after that, we will also print this message.

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So remember, these are the same variable names here.

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So now when you run this code, you will see this message.

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But you can change the value of variable in your program at any time, and Python will always keep track

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of its current value.