Specify index_var to make that variable count from one value to
another by a particular increment. @var{index_var} must be a pre-existing
numeric variable. @var{start}, @var{end}, and @var{incr} are numeric expressions
-(@pxref{Expressions}.)
+(@pxref{Expressions}.)
During the first iteration, @var{index_var} is set to the value of @var{start}.
During each successive iteration, @var{index_var} is increased by the value of
-@var{incr}. If @var{end} > @var{start}, then the loop terminates
+@var{incr}. If @var{end} > @var{start}, then the loop terminates
when @var{index_var} > @var{end};
otherwise it terminates when @var{index_var} < @var{end}. If @var{incr} is not specified
then it defaults to +1 or -1 as appropriate.
loop, not at the beginning, so that the body of a loop with only a
condition on @cmd{END LOOP} will always execute at least once.
-If neither the index clause nor either condition clause is
-present, then the loop is executed @var{max_loops} (@pxref{SET}) times.
+If the index clause is not
+present, then the loop is executed at most @var{max_loops} (@pxref{SET}) times
+(but possibly fewer, if a condition clause evaluates to false or if
+@cmd{BREAK} executes).
The default value of @var{max_loops} is 40.
@cmd{BREAK} also terminates @cmd{LOOP} execution (@pxref{BREAK}).