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F.6. POINT
T
he
POIN
T
function returns
a
nurnber \•1hich
rrcprcscnts
the
pattern
of
activated
dots within
the given
column.
Thus.
the POINT functio
n
allows the "sensing"
of any
column
on
the
d
isplay
under
program
control
.
The
format
of
the
POINT
function
is
:
POINT
position-expression
\Yhcrc:
position-expression
evaluates
to
a
number
in
the
range
0
to
155
and
represents
the
column
to
be
investigated.
The
value returned by
the PO INT fu nction is
a number in the
range
0
to
127.
The in
terpreta·
tion
of this
number
is
a sum of
pov1ers
of
2
as
explained
in
the
section on GPRIN
T.
As
an
illustration
assume
that
o
n
the
d isplay
is a
capital
I
in
columns
40 through
44:
1
-
-•-*
-
*-
-
2
- - - -
·
- - - -
4
___
_
.,
___
_
8
- - - -
·
- - -
-
16
-
- -
-
•
-
-
-
-
32
-
-
-
-
•
-
-
-
-
64
-
- *-
·
-
·
--
4
4
4
4
4
0
2
3
4
The expl'ession
:
POINT
40
would
return 0,
POINT 41
would
return
65,
POINT
42 would return 127.
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94
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