Python: Hello World

  1. Introduction to Python
  2. Python: Choosing a Text Editor or IDE
  3. Python: Hello World
  4. Python: Variables, Strings and Numbers
  5. Python: Variable Naming
  6. Python: Math, Familiar
  7. Python: Math, Less Familiar
  8. Python: Mathematical Order of Operations
  9. Python: Introducing PEP 8
  10. Python: Text Concatenation
  11. Python: if Statements and Comparison Operators
  12. Python: else and elif statements
  13. Python: Testing Multiple Conditions
  14. Python: Testing Sets of Conditions
  15. Python: Nested if Statements
  16. Python: Lists
  17. Python: Adding To and Changing Lists
  18. Python: Lists: Take a Slice, Delete Elements, Popping Elements
  19. Python: Tuples
  20. Python: for Loops
  21. Python: Nested for Loops
  22. Python: Capturing and Formatting User Input
  23. Python: Dictionaries
  24. Python: Functions
  25. Python: While Loops
  26. Python: Data Files
  27. Python: Using Pexpect
  28. Python : Using Pexpect : ftpTestOffload.sh
  29. Python : Using Pexpect: ftpTest.py
  30. Python: DCL Conversion to Python

We’re going to start with Chapter 1 of A Smarter Way.

1. Open a Linux terminal.

Then run the command:

python

2. Simple Print Output: “Hello World”

print("Hello, World!")

Older versions of Python (most often the classic 2.7) can use slightly different syntax:

print "Hello, World!"

Note that in the first example, there are no spaces. This is a stylistic thing, which is a very big deal in Python. We’ll look at this more closely when we look at PEP 8.

Exercises

Go to http://www.asmarterwaytolearn.com/python/1.html and review the exercises.

Go to http://introtopython.org/hello_world.html and run the examples.

  1. Begin a new script file in nano.
  2. Name it examples.py.
  3. Make it print out one line of text: “Welcome to the Examples”.