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Section 1: Getting Started 29
File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 29 of 275
Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm
Clearing Storage Registers
To clear a single storage register — that is, to replace the number in it with
zero — merely store zero into it. You need not clear a storage register before
storing data into it; the storing operation automatically clears the register before
the data is stored.
To clear all storage registers at once — including the financial registers, the stack
registers, and the LAST X register — press
f
CLEAR
H
.
*
This also clears the
display.
All storage registers are also cleared when Continuous Memory is reset (as
described on page 86).
Storage Register Arithmetic
Suppose you wanted to perform an arithmetic operation with the number in the
display and the number in a storage register, then store the result back into the
same register without altering the number in the display. The hp 12c platinum
enables you to do all this in a single operation:
1. Press ?.
2. Press +, -, §, or z to specify the desired operation.
3. Key in the register number.
When storage register arithmetic is performed, the new number in the register is
determined according to the following rule:
Storage register arithmetic is possible with only registers R
0
through R
4
.
Example:
In the example on page 23, we updated the balance in your
checkbook. Let’s suppose that because data is stored indefinitely in your
calculator’s Continuous Memory, you keep track of your checking account balance
in the calculator. You could use storage register arithmetic to quickly update the
balance after depositing or writing checks.
Keystrokes Display
58.33
?
0
58.33
Stores the current balance in register
R
0
.
*
fCLEARH is not programmable.