Array Variables - Sharp PC-1403 Operation Manual

81
X(4)
=
8
The first statement creates an array X with 6 storage locations. The second statement
creates an array AA with 25 locations. The third statement creates an array with one
location and is actually rather silly since (for numbers at least), it is the same as
declaring a single-value numeric variable.
It is important to know that array variable X and variable X are separate, and unique to
SHARP. The first X denotes a series of numeric storage locations, and the second a
single and ditterent location.
Now that you know how to create arrays, you might be wondering how to refer to each
storage location. Since the entire group has only one name, the way in which we refer
to a single location (called an "element") is to follow the group name with a number in
parentheses. This number is called "subscript". Thus, for example, to store the
number 8 into the fifth element of our array X (declared previously), we would write:
DIM X(5)
DIM AA(24)
DIM 05(0)
numeric-variable-name is a variable name which conforms to the normal rules for
numeric variable names previousl y discussed.
size is the
number
of
storage l o cations and must be a number in the range
0
through
255. Note that when you specify a number for the size, you get one more location
than you specified.
Examples of legal numeric DIMension statements are:
Array Variables
For some purposes, i1 is useful to deal with numbers as an organized group, such as a
list of scores or a lax tabl e . In BASI C these groups are called arrays. An array can be
either one-dimensional, like a list, or two-dimensional, like a table.
To define an array, the DIM (short for dimension) statement is used. Arrays must
always be "declared" (defined) before they are used (no1 like the single-value
variables we have been using). The form for the numeric DIMension statement is:
DIM numeric-variable-name (size)
where:
Notes: • The functions and BASIC commands inherent to the computer are not
usable as variable names.
e.g., Pl, IF, TO, ON, SIN,
etc.
• Each simple character variabl e can hold up to 16 characters and symbols.
Concepts and Terms of BASIC