NUMBER
When you
are
in
Number
Mode, if a line number generated is
already a line
in
the program, then the existing program line
is
displayed with the line number. Note
that
when
an
existing
program line is displayed
in
Number
Mode, the prompt
character
(»
is
not shown to the left of the line number.
This
indicates the
line is
an
existing
program
line and you may choose to edit the line.
For information on editing, see the section below.
If
you do not
want to change the existing line, simply
press
ENTER when the line
is displayed
and
it will not be changed. After you
press
ENTER, the
next line
number
is generated.
In Number Mode, if you enter a program line
and
an
error
occurs,
the appropriate
error
message is displayed
as
usual
and
then the
same
line
number
is
displayed
again.
Retype
the
line
correctly
and
then enter it again.
If
a line number would be generated in
Number
Mode which
is
greater than 32767, the computer leaves
Number
Mode.
Editing In Number Mode
Whether you
are
elltering
new
lines or changing existing program
lines while
in
Number
Mode, all of the special editing keys may be
used.
Since
some
of the keys
work
differently in
Number
Mode
tlmll
ill
CUllllllcUlU
Muue,
the keys
and
how they
work
in
Number
Mode
are
discussed here.
ENTER -
This
key
has
different
functions
depending
on
the
situation.
The
functions
and
situations
are
described below.
•
If
you press ENTER immediately after a line number is generated,
then the computer leaves Number Mode.
•
If
you type
in
a
statement
after the line number is generated
and
then
press
ENTER,
the
new
line
is
added
to
the
program,
Then
the
next line number is generated,
•
If
an
existing program line is displayed and you press ENTER
immediately after
It
IS
dIsplayed, the line remains the
same
in
the
program.
Then
the next line number is generated.
• If;:ln p.xisting
program
line
is
displayed
and
you
erase
the
entire
text of the line (leaving only the line
number
on the screen) and
then press
ENTER,
the computer leaves Number Mode.
The
program
line
is
not
removed
from
the
program,
•
If
you edit a line after it is displayed
as
an
existing program line
and text still remains after the line number
and
then press ENTER,
the existing program line
is
replaced by the edited line.
Then
the
next line
number
is generated.
11-26
Examples:
>NEW
>100 A=37.1
>110
9=1,9.6
>NUMBER
110
110
B=49.6
>120
PRINT
A;B
>130
END
>140
ENTER
>LlST
100 A"'37.1
110
8=49.6
120
PRINT A;B
130
END
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