HP 25 Owner's Handbook Manual page 98

94 Programming
If you key in data after the program has stopped running ,
remember that resuming program execution does not terminate
digit entry . Thus, the calculator will assume that the digits in
the program are part of the number you have just keyed in un-
less you press
mIim
after you key in the data and before you
resume running the program , or there is an
mIim
in the
program immediately after the
~
instruction .
Changing One Instruction
Changing or correcting one step of your program is easy with
your HP-25 calculator because ofthe features built into it. Once
the error has been found , use
mJ
or
mJ
in PRGM mode or
ram
in RUN mode to display the step
preceding
the step to be
changed . For example, to change the instruction in step 06 , you
need to display step 05 . If you wish to change the step, simply
press the correct key or keys for step 06. They will write over
and replace the incorrect information already stored in that step.
If step 06 is an extra step in your program, press
m
~
(no
operation).
This instruction tells the calculator not to perfo rm
any operation here .
Example Program. The program represented below is de-
signed to take the cube root of a number.
Press Display
mIim
101 31 1
[2]
102 031
m
[KJ
103 ' 15 22 1
D CZl
104 14 03 1
Suppose that upon reviewing the program with the mDkey ,
however , you discover you have keyed in the following mis-
take-ridden program :
Press
Display
mIim
101 31 1
[2]
1 02 03 1
m ~
103
15 21
1
Oops! You pressed the wrong
key.
mJ
104
21 1
And you pressed it again by
mistake .
D CZl
105
14· 031