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Python Syntax


Execute Python Syntax

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

Python Indentations

Where in other programming languages the indentation in code is for readability only, in Python the indentation is very important.

Python uses indentation to indicate a block of code.

Example

if 5 > 2:
  print("Five is greater than two!")
Run example »

Python will give you an error if you skip the indentation:

Example

if 5 > 2:
print("Five is greater than two!")
Run example »


Python Variables

In Python variables are created the moment you assign a value to it:

Example

Variables in Python:

x = 5
y = "Hello, World!"
Run example »

Python has no command for declaring a variable.

You will learn more about variables in the Python Variables chapter.


Comments

Python has commenting capability for the purpose of in-code documentation.

Comments start with a #, and Python will render the rest of the line as a comment:

Example

Comments in Python:

#This is a comment.
print("Hello, World!")
Run example »

Test Yourself With Exercises

Exercise:

Insert the missing part of the code below to output "Hello World".

("Hello World")

Start the Exercise