.pg
.x repeat
.x continue
.x break
.x until
.lt
------------------------------------------------------------------------
REPEAT
  CONTINUE
  ...
  BREAK
UNTIL [NOT] predicate
------------------------------------------------------------------------
.el
.b 3
The REPEAT-UNTIL iterative control structure:
.b
.lt
	repeat
		statements
	until predicate
.el
.b
is equivalent to:
.b
.lt
	loop
		statements
		if predicate then
			break
		end
	end
.el
.b
See LOOP and IF.