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Statements and Functions Used for Declaring Constants and Variables
 
                          Statement or
Task                      function           Action
═══════════════════════   ════════════════   ═════════════════════════════
 
Defining and declaring    COMMON             Defines global variables for
variables                                    sharing between modules or for
                                             changing to another program.
 
                          DIM                Declares a variable and
                                             allocates storage.
 
                          OPTION BASE        Declares the default lower bound
                                             for array subscripts.
 
Declaring data types      CONST              Declares symbolic constants for
                                             use in place of values.
 
                          DATA               Stores the numeric and string
                                             constants used by the program's
                                             READ statements.
 
                          DEFtypes           Sets the default data types
                                             for variables, DEF FN functions,
                                             and FUNCTIONS procedures.
 
                          TYPE               Defines an ISAM table type that
                                             contains one or more table
                                             columns in an ISAM record.
 
 
Reading DATA statements   READ               Reads values from a DATA
                                             statement and assigns the values
                                             to variables.
 
                          RESTORE            Allows DATA statements to be
                                             reread from a specified line.
 
Getting array             LBOUND             Returns the lower bound
information                                  (smallest available subscript)
                                             for the indicated dimension of
                                             an array.
 
                          UBOUND             Returns the upper bound
                                             (largest available subscript)
                                             for the indicated dimension of
                                             an array.
 
 
Modifying memory of       ERASE              Reinitializes the elements of
arrays                                       static arrays; deallocates
                                             dynamic arrays.
 
                          REDIM              Changes the space allocated to
                                             an array that has been declared
                                             dynamic.