HP 113394 User Guide - Page 29

Section 1: Getting Started 29 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 fCLEARH.* 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 R4. 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 R0. * fCLEARH is not programmable. 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