HP HP12C hp 12c_user's guide_English_E_HDPMBF12E44.pdf - Page 24

24 Section 1: Getting Started Later that same day ... Keystrokes ; :1 6§ :2 + Display 2,500.00 Turns the calculator back on. 3,250.00 Recalls the cost of the computer to the display. 19,500.00 Multiplies the quantity ordered to get the cost of the computers. 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 fCLEARH.* 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. File name: hp 12c_user's guide_English_HDPMBF12E44 Printered Date: 2005/7/29 Page: 24 of 209 Dimension: 14.8 cm x 21 cm