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Programming
81
To run the program
switch
to
automatic
RUN
modePRG
M.mIl
RUN
and press
0
1
PRGM
I
(or
ram
@]
@])
so
that the calculator
will
begin
execution
from step 00.
Then
try the following
example
.
Example. Find the increase in volume
of
a
s
pherical balloon if
the diameter changes from
30
feet to 35 feet.
Press
Display
30
miim
L . . :
I
3
~
0.
=
00
,
,-------,
35
[R7SJ
1
8312.13
Displaying Each Step
Enter
the original diameter
into
Y.
Key the new diameter into X
and
run the
program.
The
answer,
in
cubic
feet, is displayed.
In order to look
at
this program,
you
need to be
able
to
display
each
step. Two operations allow you
todo this:mJ
(sillgle step)
andllm(back
step).
With the increase in
sphere
volume
program still
rec orded in
the
calculator
set
the PRGM-RUN
switch to
RUN
PRGM..:lRUN
and
press
0
I
PRGM
I
to
resetthe calculator
to
step
00.
Then
switch
to PRGM modePRGM'-RuN
and
press mJ
once. The display
will
change to:
I
01
31
PressmJ
again and
the display will
change
to:
I
02
03
Now
pressllm
.
You
can see
what has happened. You
are back
at
program memory
step
OI.Press
Ilm
again and step
00
is
dis-
played
.
Pressing
Ilm
again
does nothing
.
mJ displays the contents
of
the
next
step of
program memory.
Ilm
displays the contents
of
the
previous
step of
program
memory
.
Of course
,
because these two
keys work
in PRG M
mode,
neither can be stored
in
program memory.
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