I think that one of the fundamental laws of arithmetics says that a number is only equal to itself. This includes rational numbers (like 0.(9) and 1). This means that 1 != 0.(9) by definition. But ".999 repeating" is not a "number", per se. It's shorthand for an algorithm that produces a value (that happens to be 1.0) BillW -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body