

== and ##


    The == operator can be used in conditions:

Example:
          %if A == B %then .......

    The  condition  is  only true if A and B refer to the same variable;
i.e.  address AND type equivalence is required.  The operator ## can  be
used to express the inverse condition:

          %if A ## B %then .......

\== can be used instead of ##.

    Note that == and ## can only be used to compare references to scalar
variables, NOT to arrays.