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24 Section 1: Getting Started
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 24 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
Later that same day …
Keystrokes Display
;
2,500.00
Turns the calculator back on.
:1
3,250.00
Recalls the cost of the computer to the
display.
6§
19,500.00
Multiplies the quantity ordered to get
the cost of the computers.
:2
2,500.00
Recalls the cost of the printer to the
display.
+
22,000.00
Total invoice.
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 70).
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 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:
*
CLEARH is not programmable.