/*  day 3, pgm 3.3          */
 /*                          */
 /*                          */
 /* some character constants */
  data c ;
   a1 = 'stuff' ;
   a2 = "stuff" ;
   l1 = (a1=a2) ;
   a3 = 'stuff and more stuff' ;
   a4 = 'true' ;
   a5 = 'TRUE' ;
   l2 = (a4=a5) ;
   a6 = "can't" ;
   a7 = 'can''t' ;     * common pitfall !!! ;
   l3 = (a6=a7) ;
run ;

  proc print data=c ;
   var l1-l3 a1-a7 ;   * variable list ;
   title 'jan17.ex2' ;
 run ;