exceed 10 (11 items: 0 thru 10) then the array will be created by the
Interpreter and filled with zeros (or nulls if string type) the first
time any element of the array is referred to, otherwise the BASIC DIM
statement must be used to define the shape and size of the array. The
amount of memory required to store an array can be determined as follows:
  5 bytes for the array name 
 +  2 bytes for each dimension of the array 
 +  2 bytes per element for integers 
OR  +  5 bytes per element for floatingpoint 
OR  +  3 bytes per element for strings 
AND  +  1 byte per character in each string element 
Subscripts can be integer constants, variables, or an arithmetic
expression which gives an integer result. Separate subscripts, with com
mas between them, are required for each dimension of an array. Subscripts
can have values from zero up to the number of elements in the respective
dimensions of the array. Values outside that range will cause the BASIC
error message ?BAD SUBSCRIPT. Some examples of array names, value
assignments and data types are:
A$(0)="GROSS SALES"  (string array) 
MTH$(K%)="JAN"  (string array) 
G2%(X)=5  (integer array) 
CNT%(G2%(X))=CNT%(1)2  (integer array) 
FP(12*K%)=24.8  (floatingpoint array) 
SUM(CNT%(1))=FP^K%  (floatingpoint array) 
A(5)=0  (sets the 5th element in the 1 dimensional array called "A" equal to 0) 
B(5,6)=0  (sets the element in row position 5 and column position 6 in the 2 dimensional array called "B" equal to 0) 
C(1,2,3)=0  (sets the element in row position 1, column position 2, and depth position 3 in the 3 dimensional array called "C" equal to 0) 

Expressions are formed using constants, variables and/or arrays. An
expression can be a single constant, simple variable, or an array variable