HP 48G - Reserved Names and Constants

Using Names Wisely
Names may not contain delimiter characters nor be-
gin with numerals (8-9), but they may be quite long
and include lowercase letters and other non-alpha-
betic characters. But the VAR menu can display only
the first 4-5 characters in each name—and only up-
percase representations of letters. So let your names
be distinct (and descriptive) within the first few char-
acters. For example, TEST and Test are both valid
names, but they’ll both appear as onthe VAR
menu. And OBJECT1 and OBJECTEZ are both valid
names, but they'll both appear as [[2N[3M.
ReservED NAMES AND CONSTANTS
You should avoid using some names for general-pur-
pose storage, because their contents are interpreted
by the calculator for certain specific purposes:
ALEMOAT Current data for current alarms.
CST Current contents of custom menu.
EL) Current equation used by SOLVE & PLOT.
EXPR Current expression, symbolic operations.
e (Symbolic constant*) £. 71823182346,
IERR Uncertainty in current integration.
IOPAR Current parameters for I/O operations.**
i (Symbolic constant*) (B, 1.
MAXR (Symb. const.*) 9. 99999939999E499.
MHrpar Data of currently saved Minehunt game.
MINR (Symbolic constant*) 1.E-499.
Mpar Current equation set for Mult. Equ. Solver.
Mmines Current number of mines in Minehunt.
PICT Current contents of graphic display.
PPAR Current parameters for plot operations.
PRTPAR Current parameters for print operations.**
YPAR Current parameters for viewing 3-D plots.
ZPAR Saves previous PPHE for zoom operations.
der... Indicates a user-defined derivative.
nl, nZ, ...Integer coefficients used by I50L.
51, 52, ... Sign coefficients used by IS0L and GUAD.
T (Symbolic constant*) 3. 14159265359,
Z0AT Current matrix of data used for statistics.
=PAF. Current parameters for statistics calc.
*Contents of this name cannotbe changed ([STo) gives an error); display
result depends on Flags -2 and -3 (see page 78).
**Interpreted this way in the HOFME directory only.
(VAR), Variables and Names 7