HP 12C, User Manual

Page: 278 / 288

278
File name: HP 12c Pt Converted_user's guide_English_HDP0F123E02_080207 Page: 280 of 281
Printed Date: { 2007/8/2Dimension: 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) .
f
CLEAR
X
after
f
,
g
,
?
,
:
or
i
,
cancels that key
(page 19) .
f
CLEAR
X
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 233) .
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