There is no SETBF. If a boolean result is needed a SETAF so implemented that it returns only arithmetic 0|1 can, for example, be used instead.
A SETBF would be more perspicuous, nice to have; but it was apparently judged dispensable. An example of the available expedients for getting along without it would be a desirable addition to the LR. John Gilmore, Ashland, MA 01721 - USA
