1 0

     2 abc

     3 true

     4 TypeError: undefined is not an Object

     5 TypeError: null is not an Object

     6 [object Number]

     7 [object String]

     8 [object Boolean]

     9 [object Undefined]

    10 [object Null]

    11 0

    12 abc

    13 true

    14 TypeError: undefined is not an Object

    15 TypeError: null is not an Object