HP HP-15C

264 Function Summary and Index
number in display (X-
register) (enter y, then
x). Causes the stack to
drop (page 29).
Mathematics
-+-÷
Arithmetic operators;
cause the stack to drop
(page 29).
¤ Computes square
root x (page 25).
x Computes
the square of x
(page 25).
! Calculates the
factorial (n!) of x or
Gamma function () of
(1 + x) (page 25).
∕ Computes
reciprocal (page 25).
(For matrix use, refer to
Matrix Functions, page
264.)
$ 
in display (page 24).
_ Solves for real
root of a function f(x),
with the expression for
f(x) defined by the user
in a labeled subroutine
(page 180).
f Integrate.
Computes the definite
integral of f(x), with the
expression f(x) defined
by the user in a labeled
subroutine (page 194).
Matrix Functions
m Dimensions a
matrix of a given name
{A to E, V}
(page 141).
< Designates the
matrix into which the
result of certain matrix
operations is placed
(page 148).
U User mode. Row
and column numbers in
R
0
and R
1
are
automatically
incremented each time
O or l {A
to E, %} is pressed
(page 144).
O and l { A
to E, %} Stores or
recalls matrix elements
using the row and
column numbers in R
0
and R
1
(pages 144,
146).
O | and l
| {A to E, %
} Stores or recalls
matrix elements using
the row and column
numbers in the Y- and
X-registers (page 146).
O and
l> { A
to E } Stores or
recalls matrices for the
specified matrix (pages
142, 147).
O and l
< Stores or
recalls descriptor of the
result matrix (page
148).
l m {A
through E, V}
Recalls the dimensions
of the given matrix into
the Y- (row) and X-
(column) registers
(page 142).
∕ Inverts the matrix
whose descriptor is
displayed and places
the result in the
specified result matrix.
The descriptor of the
result matrix is then
displayed (page 150).
+ - * Adds,
subtracts, or multiplies
the corresponding
elements of two