HP 25 Owner's Handbook Manual page 99

Programmable scientific calculator
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Programming
95
Set the PRGM-RUN switch to PRGM
PRGM~RUN
,
press
a
1
PRGM
I,
and key in this mistake- ridden second program now.
To correct the program, press
mJ
three times to display
step
02. Then correct the first mistake by keying in the correct keys
for
step
03.
Press
Display
1
02
03
1
1
03
15 22
1
First display this
step
.
Then press the
correct
keys for
step
03.
With
step
03 displayed
you are
ready now to
correct
step 04.
Since this is
an
unwanted extra
step
,
use the
iii
~
function
to replace its contents.
Press
Display
103
15 22
1
1
04
15 74
1
Display
step
03 to
correct step
04.
Press
lil
lNop
lso
that the calcu-
lator will not perform
an
opera-
tion here.
Now
set
the PRGM-RUN
switch
back to RUN
PRGM
-.J
RUN
and
press
a
1
PRGM
I
to reset the
calculator
to
step
00. The ex-
ample
below will help you determine whether
or
not
you
have
corrected
the program.
Example.
Find the
cube
root of 8
and
then of 125.
Press
8
ffiZ§J
1251
RIS
I
Display
12.00
15.00
Adding Instructions
If you have recorded
a
medium-sized program
and
have left out
a
crucial
sequence
of keystrokes right in the middle
,
you do not
have to start over. The missing
sequence
of
keystrokes
can be
recorded in the
available steps
following
your
program. You
can then use the
miD
key to make
an
unconditional branch to the
sequence when it is needed and then make
a second
uncondi-
tional branch back to the main part of
your
program at the end
of the
sequence.

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