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HP HP-20S - Starting Programs with GTO and R;S; Stopping Programs

HP HP-20S
132 pages
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Example:
Run
the
program
labeled
A
to
find
the
areas
of
three
dif-
ferent
pipes
with
diameters
of
5,
2.5,
and
27.
Remember
to
enter
the
diameter
before executing
label
A.
Keys:
Display:
Description:
5
A
19.6350
Enters the
diameter,
then
starts
program
A.
The
resulting
area
is
displayed.
2.5
A
4.9087
Area
of
second
pipe.
2
[x][e]
3.1416
Diameter
of
third pipe.
(=]
6.2832
Area
of
third
pipe.
A
31.0063
Starting
Programs
With
GTO
and
R/S
To
execute
a
program
using
and
[R/S]:
®
Use
to
position
the
program
pointer
where
you
want
to
begin
(page
68).
B
Enter
data
required
by
the
program,
if
necessary.
B
Press
(R/S].
If
you
hold
down
[R/S],
the
line
where
execution
will
begin
is
displayed.
The
program
starts
to
run
when
is
released.
Stopping
Programs
When
a
program
is
running,
you
can
stop
it
by
pressing
or
(C]J.
Programming
a
Stop.
Pressing
while
in
Program
mode
inserts
a
STOP
instruction.
This
halts
a
running
program
until
you
press
again.
You
can
stop
a
program
to
enter
data.
You
can
use
rather
than
RTN
to
end
a
program.
When
the
program
halts,
the
pro-
gram
pointer
will
not
return
to
the
top
of
the
program.
70
6:
Programming

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