DIM declares an array or specifies a data type for a nonarray variable.
REDIM declares or resizes a dynamic array, erasing any previous values.
 
DIM [SHARED] variable[(subscripts)] [AS type]
             [,variable[(subscripts)] [AS type]]...
REDIM [SHARED] variable(subscripts) [AS type]
               [,variable(subscripts) [AS type]]...
 
    - 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)
 
See Also    <COMMON>    <ERASE>    <OPTION BASE>    <SHARED, STATIC>
            <$STATIC, $DYNAMIC>    <DIFFERENCES FROM BASICA>