data a;
  input  y name $ 3-8;
  prod = y*(1/exp(.5*log(9)));
  put @20 prod @24 name $;
  if prod=1 then put 'prod = 1  ' y;
        /*  When Y is 3, why doesn't PUT statement work? */
  if y < 3 then put 'y < 3  ' y;
  if y < = 3 then put 'y < = 3  ' y;
       /*  what is wrong with the previous statement? */
  if y > -3 then put 'y > -3  ' y;
  if name < 'bbb ' then put 'name < bbb  ' name;
      put '  ';
cards;
1 aaaaa
2 bbb
3   bbb
4    bb
5 bb
6 bb a
 ;
run;
data next; input char 1-6; cards;
aaa
   aaa
bbb
bba
bab
abb
aab
aba
baa
 ;
proc sort; proc print;
run;

        /*------------------------------
        |  Make corrections and run.    |
         ------------------------------*/