HP -28S Quick Reference

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Brand: HP

Category: Calculator

Type: Quick reference for HP HP-28S

Pages: 49

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HP-28S
SOLV Numerical solver and root finder. Symbolic solver for quadratic formulas.
See SOLV Menu.
PLOT Plotting curves on the LCD display. See PLOT Menu.
USER Display user variables and progams in the current directory.
See USER Menu.
CUSTOM Custom menu. See CUSTOM Menu.
NEXT, PREV Display next or previous set of menu soft-labels if a menu is active.
These soft-labels are displayed on the bottom of the LCD screen. When a
menu is active the cursor keys printed above of the top row of white keys
beneath the LCD display are not available. Rather, the command indicated
by the soft-label will be executed when the corresponding white key is
pressed.
ENTER
When a command line is present its contents are evaluated and
commands executed.
Without a command line this performs a DUP and pushes the stack.
See STACK Menu.
Note that ENTER is not a command! It cannot be used in a program. It
is only a command to the calculator to evaluate the command line.
EDIT Edit the contents of stack level 1.
After pressing ENTER the modified data overwrites the old contents.
CHS Change sign of number.
In a program enter NEG to negate stack level 1.
VIEW
Change the visible section of the stack so that higher stack contents are
visible. Useful when the stack contains many elements.
Cannot be used in programs.
EEX Enter exponent for number.
If not in edit mode "1E" is put into the command line.
VIEW
Change the visible section of the stack so the lower stack contents are
visible. Cannot be used in programs.
DROP Drop the stack and discard contents of stack level 1. See STACK Menu.
ROLL Move a specified stack object to level 1. See STACK Menu.
Delete character to the left in editing mode.
This does never delete the element in stack level 1.
SWAP Exchange stack level 1 and 2. See STACK Menu.
' Name or equation delimiter. See Data Types.
Note that trailing delimiters are automatically added.
VISIT
Put the
contents
of a variable for editing into the command line. Ie.
'A' VISIT puts the contents of variable A into the command line for
editing.
If the argument is a number the contents of the corresponding stack
level are retrieved for editing. Ie. 3 "A" 2 1 3 VISIT puts the
contents of stack level 3 ("A") into the command line for editing.
To abort the VISIT operation press ON. To keep modifications press
ENTER. This will store the modified data in the variable or the earlier
specified stack level.
COMMAND ENTER (or any other command that involves execution of ENTER) stores a
copy of the current command line provided MODE CMD has been activated
(see MODE Menu).
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