Canon Cat Reference Manual page 76

Calculating
With
the
Cat
[CALC] enables
you to perform calculations
anywhere
in
your text. The results become part of
the
text,
and can be
leaped to,
erased,
printed,
moved,
copied, or
sent
just
like
ordinary text. We call this
feature
Calculation-in-Context.
The results
of
calculations are marked
with a
dotted
underline to distinguish them from ordinary typed
text on
the screen. The dotted underline does
not print
on paper.
The mathematical
expression
that generated the result is
hidden or pocketed beneath
the result. Positioning
the
cursor on the underlined result and using
[CALC]
brings
back or unpockets the
underlying
expression.
@
a.
A mathematical expression.
b.
After you highlight
the ex-
pression and
use
[cALc],
the
underlined result 4.00 takes its
place. The
expression is
pocketed beneath
the
result.
c.
Positioning the cursor on
the result
and using
lctLc]
unpockets
the underlying
ex-
pression
as shown.
You
are
not
limited
to doing arithmetic
with
[CALC].
By
using named
variables
and
relative addressing you can
set
up
spreadsheets.
These features are explained
in
detail
below.
Magnitude and Precision
The
Cat keeps
numbers
to
12
places
to
the
left and
10
places
to the
right
of the
decimal
point.
It
normally displays
results
to two decimal places, corresponding to the usual
dollars-and-cents usage.
If
you
erase the
digits to
the
right of the decimal
point,
up
to
or
including
the
decimal point, thatresult
will
always be
rounded
and
displayed
with
that
precision.
For example,
if
you highlight and
[CALC]
"l
+ 2",
the result
"3.00"
is
displayed.
If
you edit
the result
to
look like
'3. "
or
"3",
further
calculations
involving the result
will
produce
a
whole number
with
no decimal
point.
Similarly,
you can type more
zeroes
after
a
result and
use
[CALCI
to
extend
the precision.
Only
zeroes
make
the
precision
extend.
Other letters or
digits
have no effect.
The
initial number of digits
to the
right of
the
decimal
point
can be changed
with
[SETU P] to
any number between 0 and
10.