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File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 269 of 275
Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm
Function Key Index
General
; Power on /off key
(page 16).
f Shift key. Selects
alternate function in gold
above the function keys
(page 16). Also used in
display formatting
(page 87).
g Shift key. Selects
alternate function in blue
on the slanted face of the
function keys (page 16).
fCLEARX after f,
g, ?, : or i,
cancels that key
(page 19).
fCLEARX also
displays mantissa of
number in the displayed
X-register (page 89).
Ú Backspacing. Deletes
last character or a
number. (page 18).
ß Undo. Recovers the
last operation.
(page 19).
Digit Entry
\ Enters a copy of
number in displayed
X-register into Y-register.
Used to separate numbers
(pages 21 and 229).
Þ Changes sign of
number or exponent of
10 in X-register
(page 17).
É Enter exponent.
After pressing, next
numbers keyed in are
exponents of 10
(page 18).
0
—
9
digits. Used for
keying in numbers
(page 21)
and display
formatting
(page 87)
.
. Decimal point
(page 17). Also used
for display formatting
(page 87).
O Clears contents of
displayed X-register to
zero (page 19).
Arithmetic
+-§z} Arithm
etic operators
(page 21).
Storage Registers
? Store. Followed
by number key,
decimal point and
number key, or top row
financial key, stores
displayed number in
storage register
specified (page 27).
Also used to perform
storage register
arithmetic (page 29).
: Recall. Followed
by number key,
decimal point and
number key, or top-row
financial key, recalls
value from storage
register specified into
the displayed X-register
(page 27).
CLEAR H Clears
contents of stack (X,Y,Z
and T), all storage
registers, statistical
registers, and financial
registers (page 28).
Leaves program memory
untouched; not
programmable.
Percentage
b Computes x% of y
and retains the y-value in
the Y-register (page 31).
à Computes percent of
change between number
in Y-register and number
in displayed X-register
(page 33).
Z Computes percent
that x is of number in
Y-register (page 35).
Calendar
Ô Sets date format to
day-month-year
(page 38); not
programmable.
Õ Sets date format to
month-day-year
(page 37); not
programmable.
D Changes a date in
the Y-register by the
number of days in the
X-register and displays
day of week (page 38).
Ò Computes the
number of days between
two dates in the Y and
X-registers (page 40).