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File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 203 of 209
Printered Date: 2005/7/29 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 71).
g Shift key. Selects
alternate function in blue
on the slanted face of the
function keys (page 16).
CLEARX after f, g,
?, : or i,
cancels that key
(page 18).
fCLEARX also
displays mantissa of
number in the displayed
X-register (page 73).
Digit Entry
\ Enters a copy of
number in displayed
X-register into Y-register.
Used to separate numbers
(pages 19 and 171).
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 19) and display
formatting (page 71).
. Decimal point
(page 17). Also used
for display formatting
(page 71).
O Clears contents of
displayed X-register to
zero (page 18).
Arithmetic
+-§z} Arithm
etic operators
(page 19).
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 23).
Also used to perform
storage register
arithmetic (page 24).
: 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 23).
CLEAR H Clears
contents of stack (X,Y,Z
and T), all storage
registers, statistical
registers, and financial
registers (page 24).
Leaves program memory
untouched; not
programmable.
Percentage
b Computes x% of y
and retains the y-value in
the Y-register (page 26).
à Computes percent of
change between number
in Y-register and number
in displayed X-register
(page 27).
Z Computes percent
that x is of number in
Y-register (page 28).
Calendar
Ô Sets date format to
day-month-year
(page 30); not
programmable.
Õ Sets date format to
month-day-year
(page 29); 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 30).
Ò Computes the
number of days between
two dates in the Y and
X-registers (page 31).