DIM - DualBrain/bsharp GitHub Wiki
To specify the maximum values for array variable subscripts and allocate storage accordingly.
Syntax
DIM variable(subscripts)[,variable(subscripts)]...
Comments
If an array variable name is used without a DIM
statement, the maximum value of its subscript(s) is assumed to be 10
. If a subscript greater than the maximum specified is used, a Subscript out of range
error occurs.
The maximum number of dimensions for an array is 255
.
The minimum value for a subscript is always 0
, unless otherwise specified with the OPTION BASE statement.
An array, once dimensioned, cannot be re-dimensioned within the program without first executing a CLEAR or ERASE statement.
The DIM
statement sets all the elements of the specified arrays to an initial value of zero.
Example
10 DIM A(20)
20 FOR I=0 TO 20
30 READ A(I)
40 NEXT I
This example reads 21 DATA
statements elsewhere in the program and assigns their values to A(0)
through A(20)
, sequentially and inclusively. If the A
array is single precision (default accuracy) then the first line will allocate 84 bytes of memory to this array (4 bytes times 21 elements).