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Radio Shack TRS-80 PC-3

Radio Shack TRS-80 PC-3
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some
action
with
your
program
or
to
set
modes
which
effect
how
your
programs are
executed.
Unlike verbs,
commands
have
immediate
effects - as
soon
as
you
complete
entering
the
command
(by pressing
the
(ENTER)
key),
the
command
will be
executed.
Commands
are
not
preceded
by a line
number:
RUN
NEW
RADIAN
Some
verbs
may
also be used as
commands.
(See
Chapter
8 for a
complete
listing
of
BASIC
commands
and
their
uses
on
the
PC-3.
Modes
You will
remember
that,
when
using
the
PC-3
as a
calculator,
it
is
set
in
the
RUN
mode.
The
RUN
mode
is
also used
to
execute
the
programs
you
create.
The
PROgram
mode
is
used
to
enter
and
edit
your
programs.
The
RSV
or
ReSerVe
mode
enables
you
to
designate and
store
predefined string variables and
is
used in
more
advanced pro-
gramming (see
Chapter
6).
Beginning
to
Program on the PC-3
After
all
your
practice
in
using
the
PC-3
as a
calculator,
you
are
probably
quite
at
home
with
the
keyboard.
From
now
on,
when
we
show
an
entry,
we will
not
show
every keystroke.
Remember
to
use (SHIFT)
to
access
characters
above
the
keys and
END
EVERY
LINE
BY
PRESSING
THE
(ENTER)
KEY.
Now
you
are ready
to
program!
Set
the
slide switch
to
the
PROgram
mode
and
enter
this
command:
61

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