HP 15c Collector's Edition User Manual

Section 7: Program Editing 87
Insertions and Deletions
After an insertion, the display will show the instruction you just added.
After a deletion, the display will show the line prior to the deleted (now
nonexistent) one.
If all space available in memory is occupied, the calculator will not accept
any program instruction insertions and Error 4 will be displayed.
Initializing Calculator Status
The contents of storage registers and the status of calculator settings will
affect a program if the program uses those registers or depends on a
certain status setting. If the current status is incorrect for the program
being run, you will get incorrect results. Therefore, it is wise to clear
registers and set relevant modes either just prior to running a program or
within the program itself. A self-initializing program is more mistake-
proof—but it also uses more program lines.
Calculator-initializing functions are: ´ CLEAR ∑, ´ CLEAR
M, ´ CLEAR Q, | D, | R, | g, | F,
and | ".
Problems
It is good programming technique to avoid using identical program labels.
(This shouldn’t be hard, since the HP 15c provides 25 different labels.) To
ensure against duplication of labels, you can clear program memory first.
1.
The following program is used by the manager of a savings and loan
company to compute the future values of savings accounts
according to the formula FV = PV(1 + i)
n
, where FV
is future value,
PV is present value, i is the periodic interest rate, and n
is the
number of periods. Enter PV first (into the Y-register) and n
second
(into the X-
register) before executing the program. Given is an
annual interest rate of 7.5% (so i = 0.075).

HP 15c Collector's Edition Specifications

General

Brand	HP
Model	15c Collector's Edition
Category	Calculator
Language	English