Commodore 128D - Viewing Your Program-The LIST Command

Notice the computer did not display COMMODORE 128 when you
pressed RETURN, as it would do if you were using the PRINT com
mand in DIRECT mode. This is because the number, 10, that comes
before the PRINT symbol (?) tells the computer that you are entering
a BASIC program. The computer just stores the numbered statement
and waits for the next input from you.
Now type RUN and press RETURN. The computer prints the words
COMMODORE 128. This is not the same as using the PRINT com
mand in DIRECT mode. What has happened here is that YOU HAVE
JUST WRITTEN AND RUN YOUR FIRST BASIC PROGRAM as small
as it may seem. The program is still in the computer's memory, so
you can run it as many times as you want.
Viewing Your Program—The LIST Command
Your one-line program is still in the C128 memory. Now clear the
screen by pressing the SHIFT and CLR/HOME keys together. The
screen is empty. At this point you may want to see the program list
ing to be sure it is still in memory. The BASIC language is equipped
with a command that lets you do just this—the LIST command.
Type LIST and press RETURN. The C128 responds with:
10 PRINT "COMMODORE 128"
READY
Anytime you want to see all the lines in your program, type LIST. This
is especially helpful if you make changes, because you can check to
be sure the new lines have been registered in the computer's mem
ory. In response to the command, the computer displays the
changed version of the line, lines, or program. Here are the rules for
using the LIST command.
—To see line N only, type LIST N and press RETURN. Substitute
N for the line number you wish to see.
—To see from line N to the end of the program, type LIST N- and
press RETURN.
—To see the lines from the beginning of the program to line N,
type LIST-N and press RETURN.
—To see from line N1 to line N2 inclusive, type LIST N1-N2 and
press RETURN.
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32 USING C128 MODE—Getting Started in BASIC