HP Prime Graphing NW280AAABA manual History in RPN mode

The same entry-line editing tools are available in RPN mode as in algebraic and textbook mode:

•Press Cto delete the character to the left of the cursor.

•Press SCto delete the character to the right of the cursor.

•Press Jto clear the entire entry line.

•Press SJto clear the entire entry line.

History in RPN mode

The results of your calculations are kept in history. This history is displayed above the entry line (and by scrolling up to calculations that are no longer immediately visible). The calculator offers three histories: one for the CAS view and two for Home view. CAS history is discussed in chapter 3. The two histories in Home view are:

•non-RPN: visible if you have chosen algebraic or textbook as your preferred entry technique

•RPN: visible only if you have chosen RPN as your preferred entry technique. The RPN history is also called the stack. As shown in the illustration below, each entry in the stack is given a number. This is the stack level number.

As more calculations are added, an entry’s stack level number increases.

If you switch from RPN to algebraic or textbook entry, your history is not lost. It is just not visible. If you switch back to RPN, your RPN history is redisplayed. Likewise, if you switch to RPN, your non-RPN history is not lost.

When you are not in RPN mode, your history is ordered chronologically: oldest calculations at the top, most recent at the

48 Reverse Polish Notation (RPN)