HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Pobierz pdf (Strona 90)

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appropriate argument for that operator. For example, pressing when there is a string on level 1

displays an error message.

An operator or function will work only on the minimum number of arguments necessary to produce a result.

Thus if you enter on the entry line 2 4 6 8 and press , stack level 1 shows 48. Multiplication needs

only two arguments, so the two arguments last entered are the ones that get multiplied. The entries 2 and 4

are not ignored: 2 is placed on stack level 3 and 4 on stack level 2.

Where a function can accept a variable number of arguments, you need to specify how many arguments you

want it to include in its operation. You do this by specifying the number in parentheses straight after the

function name. You then press to evaluate the function. For example, suppose your stack looks

like following:

Suppose further that you want to determine the minimum of just the numbers on stack levels 1, 2, and 3. You

choose the MIN function from the MATH menu and complete the entry as MIN(3). When you press

, the minimum of just the last three items on the stack is displayed.

Manipulating the stack

A number of stack-manipulation options are available. Most appear as menu items across the bottom the

screen. To see these items, you must rst select an item in history:

42 Chapter 3 Reverse Polish Notation (RPN)

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