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HP HP-11C - One-Number Functions; General FUNCLIONS

HP HP-11C
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Section
3:
Numeric
Functions
43
Example
.
To
Calculate
Keystrokes
Display
Fractional
portion
123.4567
123.4567
0.4567
Round
(Assumes
[FIX]4
1.23456789
1.23456789
display
setting.)
1.2346
Inspect
rounding.
(f](Fix)8
1.23460000
Reset
to
[FIX]4.
(f](FIx]4
1.2346
One-Number
Functions
The
HP-11C’s
one-number
math
functions
have
the
following
characteristics:
e
Use
the
number
in
the
displayed
X-register
as
the
argument
for
the
function.
¢
Replace
the
number
in
the
displayed
X-register
with
the
result
of
executing
the
function.
¢
Do
not
affect
numbers
in
the
Y-,
Z-,
and
T-registers.
General
Functions
Reciprocal.
Pressing
calculates
the
reciprocal
of
the
number
in
the
displayed
X-register,
that
is,
it
divides
1
by
the
number
in
the
displayed
X-register.
Factorial
and
Gamma.
Pressing
calculates
the
factorial
or
Gamma
value
as
follows:
1.
Factorial.
When
executed
with
a
nonnegative
integer
n
(0
<
n
<
69)
in
the
displayed
X-register,
(x!]calculates
the
factorial
of
n,
that
is, it
calculates
the
product
of
the
integers
from
1
to
n.

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