Python allows you to assign values to multiple variables in one line:
x, y, z = "Orange", "Banana", "Cherry"
print(x)
print(y)
print(z)
Note: Make sure the number of variables matches the number of values, or else you will get an error.
A variable can have a short name (like x and y) or a more descriptive name (age, carname, total_volume).
Rules for Python variables:
Variables are containers for storing data values.
Python has no command for declaring a variable.
A variable is created the moment you first assign a value to it.
x = 5
y = "John"
print(x)
print(y)
Variables do not need to be declared with any particular type, and can even change type after they have been set. Continue reading Python Variables
Comments can be used to explain Python code.
Comments can be used to make the code more readable.
Comments can be used to prevent execution when testing code.
Comments starts with a #, and Python will ignore them:
#This is a comment
print("Hello, World!")
Comments can be placed at the end of a line, and Python will ignore the rest of the line: Continue reading Python Comments
As we learned in the previous page, Python syntax can be executed by writing directly in the Command Line:
>>> print("Hello, World!")
Hello, World!
Or by creating a python file on the server, using the .py file extension, and running it in the Command Line:
C:\Users\Your Name>python myfile.py
Many PCs and Macs will have python already installed.
To check if you have python installed on a Windows PC, search in the start bar for Python or run the following on the Command Line (cmd.exe):
C:\Users\Your Name>python --version
To check if you have python installed on a Linux or Mac, then on linux open the command line or on Mac open the Terminal and type:
python –version
If you find that you do not have Python installed on your computer, then you can download it for free from the following website: python.org
Python is a popular programming language. It was created by Guido van Rossum, and released in 1991.
It is used for: