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52 Reverse Polish Notation (RPN)
DUPN Duplicates all items between (and including) the highlighted item
and the item on stack level 1. If, for example, you have selected
the item on stack level 3, selecting DUPN duplicates it and the
two items below it, places them on stack levels 1 to 3, and moves
the items that were duplicated up to stack levels 4 to 6.
Echo Places a copy of the selected result on the entry line and leaves
the source result highlighted.
LIST Creates a list of results, with the highlighted result the first element
in the list and the item on stack level 1 the last.
Show an
item
To show a result in full-screen textbook format, tap .
Tap to return to the history.
Delete an
item
To delete an item from the stack:
1. Select it. You can do this by pressing
= or \ until the item
is highlighted, or by tapping on it.
2. Press
C.
Delete all
items
To delete all items, thereby clearing the history, press SJ.
Before After