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Reverse Polish Notation (RPN) 47
2
Reverse Polish Notation (RPN)
The HP Prime provides you with three ways of entering objects in
Home view:
• Textbook
An expression is entered in much the same way was if you
were writing it on paper (with some arguments above or
below others). In other words, your entry could be two-
dimensional, as in the following example:
• Algebraic
An expression is entered on a single line. Your entry is always
one-dimensional. The same calculation as above would
appear like this is algebraic entry mode:
• RPN (Reverse Polish Notation).
The arguments of the expression are entered first followed by
the operator. The entry of an operator automatically
evaluates what has already been entered. Thus you will need
to enter a two-operator expression (as in the example above)
in two steps, one for each operator:
Step 1: 5
h – the natural logarithm of 5 is calculated and
displayed in history.
Step 2: Szn – is entered as a divisor and
applied to the previous result.
You choose your preferred entry method from page 1 of the
Home Settings screen (SH). See “System-wide settings”,
starting on page 30 for instructions on how to choose settings.
RPN is available in Home view, but not in CAS view.