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Sharp PC-1403 - Page 85

Sharp PC-1403
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79
Thi
s
mean
s
tha
t
y
o
u
ha
v
e put
n
um
e
r
i
c data into
t
he
a
r
ea
of
m
emo
ry
c
alled A and
t
hen
t
o
l
d
th
e
co
m
pu
te
r to
s
h
ow you
t
ha
t
inf
o
rmat
i
on
aga
i
n as STRING
data
.
Th
i
s
confuse
s
the
com
p
ut
e
r
s
o it says
t
ha
t
t
here
i
s
a
n
e
r
r
or
co
nditi
o
n
.
P
ress
t
he
~
key
t
o
clea
r
th
e
error
c
o
n
d
it
i
o
n
.
N
o
w try
th
e
fo
l
l
o
w
i
ng
exa
m
p
l
e
:
A$
=
"
AB
C"
I
ENTER
I
A
I
ENTER
I
ERROR 9
Fixed
Variables
The first
section
,
fixed
v
a
ri
ab
l
es
,
is
a
lwa
y
s
us
e
d
b
y
th
e computer for storing data.
It
can
be thought of as
pre-a
ll
oca
t
ed
v
a
r
i
able
s
p
ace
.
In
oth
er
w
ord
s, no matter how much
memory
your
prog
r
am
u
ses up, you
wi
l
l
alwa
ys
h
a
v
e at
l
ea
st 26
varia
b
les to choose
from to store data
i
n.
Th
is
da
t
a can
b
e
o
n
e of
t
wo
t
y
pe
s
:
N
UMERIC or STRING
(alphabetic
character
)
.
F
i
xed memory
l
oc
ati
o
ns
a
re
e
i
gh
t
byte
s
l
ong and can be used
for only one type of data
a
t a
t
i
me
.
To
i
ll
u
stra
t
e
t
h
is
,
ty
p
e
i
n
t
he following
examples
:
A=
123
[
ENTER
)
A$
[ENTER
)
You
ge
t
t
he
m
e
ssage
:
N
u
me
r
i
c
v
a
riables
Fi
xe
d
nu
m
er
i
c
v
a
ri
a
bl
es (A
to
Z)
S
imple
nu
m
er
i
c
v
a
r
ia
b
les
(AB
,
C1
,
etc.)
N
um
e
ri
c
a
r
ray
v
a
riables
F
i
xe
d
c
h
a
ra
c
te
r
varia
ble
s
(
A
$ to Z$)
S
i
m
p
l
e
c
h
ar
a
cte
r
v
a
ri
abl
es
(
BB$
,
C
2
$,
etc
.
)
Ch
ar
ac
t
er
a
r
r
a
y
v
aria
bles
Stri
ng
vari
a
bl
e
s
Va
r
iables
S II
II
To
illus
trate
t
his, key in
B
l
s
H1
FT
I
[l[
] =
l
sH
1
FT
I
rwi
B
Y
T
E
[
sH
1
nl
I
W
l
I
ENTER
].
The
va
lu
e
BYT
E
i
s
n
o
w stored in
t
h
e
va
ri
ab
l
e
8
$
.
T
o
ma
k
e
s
u
re
o
f
t
his, type
i
n
B
I
SHIFT
I
d:J
I
ENTER
)
.
T
h
e
scre
e
n shows
BYT
E
.
Th
i
s
t
i
m
e
t
h
e
d
i
spla
y
i
s
o
n the left
s
ide
o
f
t
he
scre
e
n
,
i
n
stea
d of the
rig
h
t.
V
ar
i
a
bl
es
han
d
led by
t
he SHARP COMPUTER are
d
ivided
i
n
to
th
e
f
o
llowing
;
So far,
we
'
ve
on
ly
d
is
c
u
ss
e
d
num
e
r
i
c
v
ar
iab
l
e
s.
W
ha
t
about
s
t
o
r
i
ng alphabetic
characters?
Well
,
th
e idea
i
s
t
he
sa
m
e
,
b
ut, so
t
he
comput
er
w
ill
k
now the difference
be
tween the two
k
inds of
v
a
r
i
abl
e
s
,
add
a
$
t
o
t
h
e
v
a
r
iable
n
am
e
.
F
o
r in
s
t
a
n
c
e,
let'
s
s
tore the word BYTE
i
n
th
e
va
r
i
ab
l
e
8$
.
N
o
t
ice
th
e$
afte
r
t
he
B
?
This
te
ll
s
t
he
co
m
put
e
r that the
con
t
e
nt
s of
t
h
e
l
etter B
a
r
e
alphabe
ti
c
,
o
r
st
r
in
g
da
t
a.
Concepts and Terms
of
BASIC

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