HP 33s hp 33s_user's manual_English_E_HDPM20PIE56.pdf - Page 164
Keys That Clear, To enter an equation in a program line
UPC - 082916001456
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5. End the program with a return instruction, which sets the program pointer back to ! after the program runs. Press | . 6. Press (or { e ) to cancel program entry. Numbers in program lines are stored as 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 | H 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 b 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 and to scroll the display. Keys That Clear Note these special conditions during program entry: always cancels program entry. It never clears a number to zero. If the program line doesn't contain an equation, b deletes the current program line. It backspaces if a digit is being entered ("_" cursor present). If the program line contains an equation, b begins editing the equation. It deletes the rightmost function or variable if an equation is being entered ("¾" cursor present). { c {} deletes a program line if it contains an equation. To program a function to clear the X-register, use { c {º}. 12-6 Simple Programming