title: How to find maximum observation length in a column?
body: <p>How to find maximum observation length within a column so that i am able to<br>
  apply formatted input while using input?     </p>
  
  <pre><code> data class;
   input name$;
   cards;
     Alfred
     Alice
     Barbara
     Carol
     Henry
   ;
   run;     
  </code></pre>