HP HP-15C, Руководство пользователя

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266 Function Summary and Index
register) by truncating
fractional portion
(page
24) .
&
Rounds mantissa
of entire (10-digit)
number in X-register to
match display format
(page 24) .
Percentage
k
Percent. Computes
x % (value in display) of
number in the Y-
register
(page 29) .
Unlike most two-
number functions,
k
does not drop the stack.
∆
Percent difference.
Computes percent of
change between number
in Y-register and
number in display
(page 30) . Does not
drop the stack.
Prefix Keys
´
Pressed before a
function key to select
the gold function
printed above that key
(page 18) .
|
Pressed before a
function key to select
the blue function
printed below that key
(page 18) .
For other prefix keys,
refer to Display Control
keys (page 263),
Storage keys (page
267), and the
Programming Summary
and Index (page 269).
CLEAR
u
Cancels any prefix
keystrokes and partially
entered instructions
such as
´ i
(page 19) . Also
displays the complete
10-digit mantissa of the
number in the display
(page 60) .
Probability
c
Combination.
Computes the number
of possible sets of
y
different items taken x
at a time, and causes the
stack to drop
(page 47) .
(For matrix use, refer to
Matrix Functions keys,
page 264.)
p
Permutation.
Computes the number
of possible different
arrangements of
y
different items taken x
at a time, and causes the
stack to drop
(page 47) .
(For matrix use, refer to
Matrix Functions keys,
page 264.)
Stack
Manipulation
®
Exchanges
contents of X- and Y-
stack registers
(page
34) .
X
X-register
exchange. Exchanges
contents of X-register
with those of any other
named storage register.
Used with
V
,
%
,
digit, or
.
digit
address (page 42) .
}
Real exchange
imaginary. Exchanges
the contents of the real
and imaginary X-
registers and activates
Complex mode
(page
124) .
)
Rolls down
contents of stack (page
34) .
(
Rolls up contents
of stack (page 34) .