Radio Shack TRS-80 Model III - Page 232

TRS-80
MODEL
III
Accuracy
Single-precision
calculations
involving
+
,
-
,
*
, and / are
accurate
to six
significant
digits;
double-precision
calculations
involving
the same
operations
are
accurate
to
16 significant
digits.
The
exponentiation
operator
(D
(displayed
as
"[")
is
single-precision.
The
trigonometric
and
logarithmic
functions
are
single-precision;
other
functions
have
a precision
depending
on
the input
argument and
on the
function.
For
example,
CDBL returns
a
double-precision
value;
ABS returns
a value with
the same
precision
as the input
argument.
When
converting
from
single-
to double-precision,
use
the following
technique
to
avoid
introduction
of incorrect
values in
the extra digits
of
precision:
double-precision
variable
=
VAL
( STR$
( Single-precision
variable))
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