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Atari XL User Manual

Atari XL
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CHAPTER 7
PIECES
OF STRINGS
String
variables
are
used
to
store
sequences
-
(strings'
-
of
characters.
There
are
a
number
of
BASIC
commands
which
are
used
to
manipulate
strings,
and
these
are
described
in
this
chapter.
We
saw
in
Chapter
4
that
a
string
variable
can
store
a
sequence
of
characters.
For
example:
NAME$
=
"WI
LLIAM
SHAKESPEARE"
GAME$ =
"SPACE
INVADERS"
REFERENCE$
="
ABC123D"
A
string
can
almost
any
number
of
characters,
limited
only
by
the
amount
of
memory
space
available.
The
maximum
length
of
any
string
must
be
specified
in
a
DIM
statement
before
the
string
is
used.
The
characters
in
a
string
may
be
letters,
figures,
punctuation
marks,
spaces
-
in
fact
any
of
the
characters
the
Atari
can
print.
The
number
of
characters
in
a
string
can
be
counted
using
the
function
LEN.
Try
this:
10
DIM
NAME$(25)
20
NAME$
=
"JOHN
SMITH"
30
PRINT
NAME$
40
PRINT
LEN(NAME$)
This
program
prints
the
length
as
10,
which
is
the
number
of
characters
in
NAME$
(including
the
space).
52

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Atari XL Specifications

General IconGeneral
BrandAtari
ModelXL
CategoryDesktop
LanguageEnglish

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