Apple IIe - Page 50

50
Apple
lie
Users
Handbook
Notice
that
the
_
decimal
portion
of
the
preceding
example
contains
8 digits
of
precision
. Applesoft will
round
any
additional
digits.
Applesoft
can
only
handle
numbers
expressed
in
scientific
notation
in
the
following
range
:
Largest floating
point
number-+1.70141183E+38
Smallest floating
point
number_..+2.93873588E-39
If
a
larger
number
is
encountered,
the
following
error
message
will
be
displayed
.
OVERFLOW ERROR
Any
numbers
smaller
than
that
allowed
will
be
assigned
a
value
of
0.
VARIABLES
So far,
we
have
only
discussed
data
constants.
A
constant
can
be
defined
as a fixed value.
The
following
are
examples
of
string
and
numeric
constants.
"JACK
NOVET"
"375"
27.59
0
100000
A
name
can
be
used
to
express
data
as
well
as a
constant
.
Variables
are
used
to
express
data
as a
name.
BASIC
Variables
A
variable
can
be
defined
as a
quantity
that
can
assume
any
one
of
a
group
of
values. Variables
are
represented
by
variable
names.
These
consist
of
a
letter
followed
optionally
by
additional
letters
and/or
numbers.
The
value
assumed
by a
variable
is
subject
to
change
,
depending
upon
the
program
statement
being
executed.
For
example
,
in
the
following: