Hi
I am using  the function    printBoard board  (DrRacket  Pretty Big) 

(printBoard  '((0 0 2 0) (0 0 0 0) (0 0 8 0) (0 0 0 0)))

and the result is 

(0 0 2 0)
(0 0 0 0)
(0 0 8 0)
(0 0 0 0)
"" 

How do I delete the "" ?

I would like the output to be  

(0 0 2 0)
(0 0 0 0)
(0 0 8 0)
(0 0 0 0)

Thanks


P.S. the code is 

(define (buildBoard n)       ;build the started board  
   (cond ((= n 0) '())
         (else (cons '(0 0 0 0) (buildBoard (sub1 n))))))

(define (printBoard board) ;print the board
  (cond ((empty? board) "" ) 
        (else (writeln(first board))
         (printBoard (rest board)))))



 

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