HP 15c - Manual (Page 266)

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).