Qbasic Tutorial: The Basics (recommended for newbies)

Intro:
Qbasic is one of the easiest programming languages around. It's an
old language that runs in DOS. In this tutorial you will learn the 
very basics and the most commonly used commands. Before we begin you 
should download Qbasic first (if you haven't already) which is 
available on this site. Also, you might want to familiarize yourself 
with the definitions below.

Definitions for this first tutorial:
CLS - Clears screen
END - Ends program
PRINT - Prints characters in quotes on screen
LPRINT - Prints characters in quotes on the printer
INPUT - Saves user input into a variable
REM (or  '  ) - A note that does not effect your program
Variable - Any number that varies (end with % = number, end with $ = 
character)

The CLS Command
The easiest but most commonly used command of all! CLS simply clears 
the current buffer (screen) of anything on it. This command can be 
used at the beginning of your programs or someplace else such as a 
SUB (short for subroutine, a mini program inside a big one, we will 
learn about these and using them later). For an example of the CLS 
command look at the examples for other commands such as PRINT or LOOP. 
That should be it for CLS.

The END Command
Like the CLS command, END should be typed where you want your program 
to stop (another words, end the program, pretty self-explanatory). 
For an example, check out others, END will probably be used in all of 
them.

The PRINT Command
Another commonly used command to print characters on the screen. 
This command uses quotes ("") to note the beginning and the end of the 
PRINT.

Example:

CLS
PRINT "The PRINT command!"
END

Type this program in Qbasic and hit SHIFT+F5 to run it, or go by the 
menu. As you can see, the program printed on the screen what was in 
the quotes. Change what it prints (by changing text in quotes). Get 
familiar with this command, you will need it often.

The LPRINT Command
The exact same thing as the PRINT command, but prints what is in the 
quotes on the printer. Useful!

Reminder - Be sure your printer is on when you run this program.

Example:

CLS
PRINT "Now printing message on printer."
LPRINT "The LPRINT command!"

The INPUT Command
This command allows the user to type stuff that is saved as data into 
variables. With this command, we can make the example above a lot 
better, try this one.

Example:

CLS
INPUT "What do you want the printer to print?", word$
LPRINT word$
END

The input, printed the question on the screen, then had a blinking 
cursor after it to allow the user to type in something. Then, whatever 
the user typed in, the text is saved in the variable word$. Play 
around with this program, find out what works and doesn't.

The REM Command
A command that does not effect your program, just adds a little 
footnote. Very useful when your programs get long.

Example:

REM  This program is by me!
CLS
REM  Notice the REM command does not effect your program
PRINT "Hello World!"
END

The REM command can also be used with a  '  which I find is easier, 
because it doesn't stand out like typing in REM.

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I will have more on this tutorial later.