Now press
[RETURN]
and
line 5 will now be corrected
in
the
memory. Type in:
L; 5 t
.[RETURN]
.... to check line 5 is now correct.
The
AUT
0 command, described
later
in
this
manual,
may
be used to edit a number of
successive lines
in
a
similar
manner
to
that
described
in
the
Editing Cursor Method.
Copy Cursor Method
The
copy cursor is
another
cursor (in addition to
the
one already on
the
screen) which
comes into view
when
you hold down
[SHIFT]
and
press one
ofthe
cursor keys.
It
then
detaches
itself
from
the
main
cursor
and
can
then
be moved around the screen
independently.
'
To correct
the
mistakes
in
line 1 0
and
30,
hold down
the
[SHIFT]
key
then
press
the
cursor
up
key
0.
until
the
copy cursor is positioned over
the
very beginning of line
1
0. You will notice
the
main
cursor
has
not moved,
so
there
are
now two cursors on
the
screen. Now press
the
[COPy] key
until
the
copy cursor is positioned over
the
space between
you
and
n a me. You will notice
that
line 1 0 is being re-written on
the
last
line
and
the
main
cursor stops
at
the
same place as
the
copy cursor. Now type
in
the
letter
r.
This will
appear
on
the
bottom line only.
The
main
cursor
has
moved
but
the
copy cursor stayed where
it
was. Now press
the
[COPy]
key
until
the
whole of line 1 0 is copied. Press
[RETURN]
and
this new line
10
will be stored
in
the
memory. The copy cursor disappears
and
the
main
cursor
positions
itself
under
the
new line 1 0.
To
correct
the
second mistake, hold down
[SHIFT]
and
press
the
cursor up key
0.
until
the
copy cursor appears over
the
very beginning ofline
30.
Press
[COPy]
until
the
copy cursor is positioned over
the
quotation
marks
next to
say.
Now press
the
space
bar
once. A space wiil be inserted on
the
bottom line. Hold
down
the
[COPy] key
until
the
whole ofline
30
is copied,
then
press
[RETURN].
You can now
list
the
program to check
that
it
is corrected
in
the
memory by typing in:
Lis
t
[RETURN]
NOTE:
To
move
the
cursor quickly (during editing) to
the
left or
right
hand
end of a
line, hold down
the
[CONTROL]
key
then
press
the
left Q or
right
I)
cursor key once.
Now
reset
the
computer by pressing
[CONTROL]
[SHIFT]
and
[ESC]
keys.
IF
The
I F
and
THE
N commands
ask
the
computer to
test
for a specified condition,
then
take
action depending upon
the
result
ofthat
test. For example,
in
the
instruction:
Chapter 1
Page
28
Foundation Course
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