function

[1]

TypeError

SyntaxError

undefined

[1, [2, 3, 4]]

[1, 2, 3, 4]

[[1, 2, 3, 4]]

[[1, [2, 3, 4]]]

Error

55

10

10 55

SyntaxError

Undefined

"global" "outer-2" "inner"

"global" "outer" "inner"

"guess" "outer" "inner"

"guess" "outer-2" "inner"

Error

Error

false

1

true

undefined

true

3

false

1

[false, true, true ,true]

"1234567890"

"(098)765-4321"

"(123)456-7890"

"0987654321"

SyntaxError

{ a: 'b' } [ 'a' ]

{ Symbol( 'let' ): 'const' } [ '{Symbol( 'let' )}' ]

{ Symbol( 'let' ): 'const' } []

{} []

ReferenceError

key: 'c'

key: 'b'

25

35

{}

ReferenceError

"Error"

"Hello world"

SyntaxError

undefined