HP 12C Platinum Financial Calculator User's Guide download pdf (Page 142)

142 Section 10: Program Editing

File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 142 of 275

Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm

Keystrokes

(ALG mode)

Display

15000

12,000.00

Net income after 20% tax is

subtracted from $15,000

income.

Adding Instructions within a Program

If an instruction is to be added within a program, simply keying it in will replace

the instruction previously stored in that program line, as described above; the

contents of all higher-numbered program lines remain unchanged.

To add instructions within a program, you could simply key in the new instructions,

beginning at the proper program line, followed by the original instructions from

that program line through the end of the program. This method is described below

under Adding Instructions by Replacement. When instructions must be added in the

middle of a long program, however, using this method will require you to key in

numerous instructions — namely, the original instructions from the point at which

the new instructions are added through the end of program memory. Since keying

in these instructions may require a significant amount of time, in such situations you

may prefer to use the method described below under Adding Instructions by

Branching.

That method basically involves branching to the new instructions which are stored

at the end of program memory, then branching back to the program line

immediately following the line from which you branched out. Adding instructions

by branching is not so simple as adding instructions by replacement; however, it

generally will require fewer keystrokes whenever there are more than four program

lines between (and including) the first line to be executed after the new instruction(s)

and the last line you keyed into program memory. Furthermore, if program

memory includes branches to program lines following the point at which the new

instruction(s) are being added, adding instructions by branching will not require

that you change the line numbers specified in the

instructions, which may be

necessary when you add instructions by replacement.

Adding Instructions by Replacement

1. Press fs to set the calculator to Program mode.

2. Press gi. followed by three digits that specify the last program line to

be executed before the added instruction(s). This sets the calculator to the

proper program line for adding the new instruction(s) in the next step.

3. Key in the new instruction or instructions.

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HP 12C Platinum Financial Calculator User's Guide Page 142

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