data _null_;
/* Without declaring the lenght of day,
day names would be cut after the sixth
character because 'Monday' would initialize
the length to 6. Or so... */
length day $ 9;
do day='Monday','Tuesday','Wednesday', 'Thursday', 'Friday';
put day;
end;
run;
data _null_;
do i = 10 to 12,
19, 20, 21,
5 to 25 by 6;
put i=;
end;
run;