VMS Help DCL Tips, Integer  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    DCL treats all numeric values as integers. If you do not specify
    an explicit radix, numeric values are interpreted as decimal. You
    may specify an explicit radix as follows:

    %D1000 decimal radix
    %O1357 octal radix
    %X12AF hexadecimal radix

    No blanks are allowed between the radix symbol and the number.

    For additional information on specifying integers, refer to the
    OpenVMS User's Manual.