HP 35s HP 35s scientific calculator - User Guide - Page 189

5. End the program with a return instruction, which sets the program pointer back to after the program runs. Press . 6. Press  (or  ) to cancel program entry. Numbers in program lines are stored precisely as you entered them, and they're displayed using ALL or SCI format. (If a long number is shortened in the display, press  to view all digits.) To enter an equation in a program line: 1. Press  to activate Equation-entry mode. The EQN annunciator turns on. 2. Enter the equation as you would in the equation list. See chapter 6 for details. Use  to correct errors as you type. 3. Press  to terminate the equation and display its left end. (The equation does not become part of the equation list.) After you've entered an equation, you can press   to see its checksum and length. Hold the  key to keep the values in the display. For a long equation, the and  annunciators show that scrolling is active for this program line. You can use Ö and Õ to scroll the display. Clear functions and backspace key Note these special conditions during program entry:  always cancels program entry. It never clears a number to zero. In program line view status,  deletes the current program line and Ö/ Õ begins the edit status. In program line edit status,  deletes a character before the cursor. To program a function to clear the X-register, use  When you insert or erase a line in a program, GTO and XEQ statements are automatically updated if needed. For example: Simple Programming 13-7