Task

Verify that a file called     input.txt     and   a directory called     docs     exist.



This should be done twice:  

   once for the current working directory,   and
   once for a file and a directory in the filesystem root.


Optional criteria (May 2015):   verify it works with:

   zero-length files
   an unusual filename:     `Abdu'l-Bahá.txt  


(dolist (file '("input.txt" "/input.txt"))
  (if (file? file true)
      (println "file " file " exists")))
 
(dolist (dir '("docs" "/docs"))
  (if (directory? dir)
      (println "directory " dir " exists")))