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Atari 400 - Page 158

Atari 400
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Press
the
RETURN
key.
Look! There's our original program.
SCREEN 8
The
LIST
command tells
thecomputer
to
display
the program currently in its memory.
The
LIST
command
is
especially useful
when
writing
long
programs, because
you
can check for errors
that
your
computer can't
catch-like
misspelling a
word
or
inserting an incorrect number.
If
you
want
to
type a different program
into
your
computer
now
,
you
/lave
to
erase this pro-
gram from
your
computer's
working
memory.
To
dO
this,
you
use
another
BASIC
command, the
NEW
command.
NEW
tells the computer
that
you
want
to
type in a
whole
new
program.
Your
computer
erases
the program presently in its
working
memory and gets set for a
new
program.
Even
though
we
aren't going
to
type a
new
program
into
the computer right
now
, let's
try
the
NEW
command
to
see
how
it
works
. Simply
type the
word
NEW
The
command appears on the screen.
SCREEN 9
156