QBasic 1.1: DIM Statement
Explanation
DIM, REDIM Statements
DIM declares an array or specifies a data type for a nonarray variable.
REDIM declares or resizes a dynamic array, erasing any previous values.
Worth knowing
Useful and cross-version information about the programming environments of QBasic, QuickBasic and Visual Basic for DOS.
Syntax
| DIM [SHARED] variable[(subscripts)] [AS type] [,variable[(subscripts)] [AS type]]... |
| REDIM [SHARED] variable(subscripts) [AS type] [,variable(subscripts) [AS type]]... |
Description / Parameter(s)
| SHARED |
Specifies that variables are shared with all SUB or FUNCTION procedures in the module. |
| variable |
The name of an array or variable. |
| subscripts |
Dimensions of the array, expressed as follows: |
| |
| [lower TO] upper [,[lower TO] upper]... |
| lower |
The lower bound of the array's subscripts. The default lower bound is zero. |
| upper |
The upper bound. |
|
| AS type |
Declares the data type of the array or variable (INTEGER, LONG, SINGLE, DOUBLE, STRING, or a user-defined data type). |
| DIM declares either static or dynamic arrays. Unless array storage has been determined by $STATIC, $DYNAMIC, or COMMON, arrays dimensioned with numbers are static and arrays dimensioned with variables are dynamic. REDIM always declares dynamic arrays. |
| Static array storage is allocated when you start a program and remains fixed. Dynamic array storage is allocated while a program runs. |
Example
' $DYNAMIC
DIM A(49, 49)
REDIM A(19, 14)