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HP HP-21 - Scientific Display

HP HP-21
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Controlling
the
Display
19
Scientific
Display
8-Digit
Number
A
Exponent
of
10
rm——
A A
Sign
Exponent
of
10
Sign
(This
means
-
1.2345678
x
1072%)
Scientific
Notation
Display
Scientific
notation
display
is
useful
when
you
are
working
with
large
or
very
small
numbers
and
allows
all
answers
to
be
dis-
played
with
a
specific
number
of
digits
after
the
decimal
point.
It
is
selected
by
pressing
[DspP]
followed
by
the
appropriate
number
key
to
specify
the
number
of
decimal
places
to
which
the
number
is
seen
rounded.
Again,
the
display
is
left-justified
and
includes
trailing
zeros
within
the
selected
setting.
For
example:
Press
Display
(Turn
the
cal-
culator
OFF,
e
N
—
123.4567
EOED
[123.46
[DsP]
2
Equals
1.23
x
102.
4
Equals
1.2346
x
102.
7
Equals
1.2345670
x
102.
In
scientific
notation
display,
the
HP-21
shows
only
eight
digits
plus
the
two-digit
exponent
of
ten.
So
even
though
you
may
try
to
carry
the
operation
out
farther,
the
calculator
will
display
a
maximum
of
eight
digits.
For
example,
continuing
the
above
operation
results
in
no
apparent
change
in
the
display:
Press
Display
8
No
change
in
display.
9
No
change
in
display.

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