* FirstLast Example
  Print the first and last names in
  alphabetical order for both 
  boys and girls. ;
  
options ls=64 nodate pageno=1;  
data kids;
  infile 'c:/datasets/kids.txt' firstobs=2;
  input name $ gender $ age;
  
proc sort;
  by gender name;
  
data answer;
  set kids;
     by gender;
     if first.gender or last.gender;
     firstvar = first.gender;
     lastvar = last.gender;
     
proc print;

run;
quit;