1. Programming In Any Language With “Hello, World!” Examples
Dr. C. Floyd Richmond
This presentation could be presented in an hour, or can outline an entire course on any programming language.

2. Elements of All Programs
Variables – Declarations, Numbers, Strings, Boolean, Reserved Words
Math – Operations, Comparisons
Commands and Functions - Syntax, Data Structures, Input and Output
Program Flow - Control Structures, Mains, Subroutines, Conditionals,
Objects – buttons, text fields, images, sounds, video, menus, dialogs, alerts, draw
Events – keyboard, mouse, touchpad, path hiearchy
Input and Output – files, parsing data
Tools - Installation, Writing Code, Loading Libraries, Compiling/Running, Debugging Errors

3. Variables and Reserved Words
Variables are symbols (usually a letter, word, or phrase) which are assigned a value by the programmer (examples: A=4, numRight=numRight+1). They are used for saving changeable information for later use (reports, etc.).
Reserved words are usually letters, words or phrases defined by the programming language, so they are not available as variables (example (in some languages): pi = ).

4. Variables - Declarations
Some languages require the declaration of the type and value of a variable before it is used. Others create them as needed.
Variables may be . . .
Global (apply to the entire program – like long-term memory) or
Local (apply to only portions of the program – like short term memory).

5. Variables - Types
Numbers
Strings
Booleans

6. Variables - Numbers
Categories
Integers
Real Numbers
Precision

7. Variables - Strings
Categories
Characters
Text
Length

8. Variables - Booleans Categories
True (1)
False (0)
In some languages may be used as numbers (as indicated above)

9. Variables - Arrays
Some programs support arrays of variables (similar to a column in a spreadsheet), and double arrays (similar to a spreadsheet), and triple and higher arrays (like a three dimensional spreadsheet – a cube).

10. Variables - Arrays
The data itself will suggest whether it should be organized into arrays. These operations must be mastered for effective use.
Array Creation
Array Assignment
Array Reference
Array Index

11. Math
Operations
Comparisons

12. Math - Operations Addition (3+4=7)
Parentheses and order of operations (3+4)*5-2=?
Subtraction (7-5=2)
Power (2^2=4)
Multiplication (3*3=9)
Roots (8^(1/3)=2)
Division (9/3=3)
Modular math (5mod2=1)
Equal (assignment)
Rounding
Random

13. Math - Comparisons Equal AND Not Equal OR Greater than NOT Less Than
Is subset
Is true
Is false

14. Commands and Functions
Execute instructions with given parameters
May return success or failure of operation
Functions
Execute calculations with given parameters
Returns the value of the calculation

15. Commands and Functions
Built-in
User-Defined

16. Program Flow Program Flow Control Structures – Main and Subroutines
Conditionals (If then else, while, onErr)

17. Objects
Links
Internal
External
Creating, reading and setting values

18. Objects Buttons Creating, reading and setting values Radio Buttons
Checkboxes
Popup Options
Creating, reading and setting values

19. Objects Text Boxes Creating, reading and setting values Single line
Multiple line
Creating, reading and setting values

20. Objects
Menus
Submenus
Creating, reading and setting values

21. Objects
Dialogs
Alerts
Creating, reading and setting values

22. Objects Types: Images, Videos, Sounds
Operations: Preloading, Loading, Checking, Playing, Pausing, Stopping, Locating points, Moving to points, Replacing, Sequencing, Linking
Creating, reading and setting values

23. Objects
Drawing shapes
Creating, reading and setting values

24. Events - Input and Output
Keyboard
Mouse
Touchscreen

25. Files - Input and Output
Parsing Data
Text: characters, words, items, paragraphs
Numbers (rounding and precision)

26. Files - Input and Output
Saving Data
Save file locally
Save file on a server
Upload to a service
Save cookies

27. Tools Installation Writing Code Libraries Compiling/Running
Debugging/Errors

28. Hello World
Javascript PHP Visual Basic Python Java

29. Hello World - JavaScript
<html><body>
<script>
alert( 'Hello, World!' );
</script>
</body> </html>
Copy and paste this text into a text editor and save it as helloworld.html. Open the saved file with a browser.

30. Hello World - PHP
<html><body>   <?php echo '<p>Hello, World!</p>'; ?>   </body></html>
Copy and paste this text into a text editor and save it as helloworld.html. Open the saved file with a browser.

31. Hello World – VisualBasic
Module Hello
Sub Main()
MsgBox("Hello, World!")
End Sub 
End Module
Run VisualBasic in Windows. File>New Project. Copy and paste this code into the program area. Press play to run.

32. Hello World – Python print("Hello, World!")
Run the terminal, type python, and at the prompt, type the command above and press return.
Quit Python by typing quit and pressing return
. . . OR . . .
Copy and paste this text into a text editor and save it as helloworld.py. From the terminal, type python, then run ”helloworld.py” Quit Python by typing quit and pressing return.

33. Hello World – Java public class HelloWorld { }
public static void main(String[] args)
{System.out.println("Hello, World!"); } }
Copy and paste this program into a text file, save it as helloworld.java.
From the terminal, compile it by typing javac “helloworld.java”
Execute it from the terminal by typing java helloworld.

34. Hello World – Swift (Apple iOS and OSX)
labelText.text=“Hello, World!”
Run Xcode and create single view application, click next, and save.
Go to main.storyboard, create a label with no display name,
Go to ViewController.swift,
After “class ViewController: UIViewController {” and before “}” . . .
Control-drag from the label in the main.storyboard to the code area and name it labelText.
Press return and enter the code above (labelText.text=“Hello, World!!”)
Run as an iPhone or iPad app.
For a similar but more sophisticated project see this link:
Hello: Calculator:
Creating applications for OSX is exactly the same, but build for OSX instead.

35. Real World Examples
By Floyd Richmond

36. Music Fundamentals Lessons

37. Saxophone Fingerings

38. Online Notation
Proof of concept

39. Programming In Any Language With “Hello, World!” Examples
Dr. C. Floyd Richmond