More Logical Operations


  • A list ?


    		•  (listp item)
  • Not a list ?


    		•  (atom item)
  • Null ?


    		•  (null item)


    Examples

      (setq a_num 4.5)

      (setq a_char 'w)

      (setq a_list '(a b c))

      (listp a_char)

      (listp a_list)

      (atom a_num)

      (atom a_list)

      (null a_list)

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