1 delete x? false

     2 typeof x = number

     3 delete f? true

     4 typeof f = undefined

     5 delete foo? false

     6 typeof foo = number

     7 delete func? false

     8 typeof func = function

     9 delete foo? false

    10 typeof foo? number

    11 foo = 33

    12 x in function = local

    13 delete x? = true

    14 x after delete = global

    15 x = global