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Example Scheme Fns: append

• append takes two lists as parameters; returns the first parameter list with the elements of the second parameter list appended at the end

      (define (append lis1 lis2)
          (cond
              ((null? lis1) lis2)
              (else
                  (cons (car lis1) (append (cdr lis1) lis2)))
          )
      )