"number"

"array"

"object"

"NaN"

TypeError

ReferenceError

5

true

0

1

1

true

4

5

Error

{ "firstName": "Anna" }

{ "firstName": "Artur" }

[{ "firstName": "Artur" }]

[{ "firstName": "Anna" }]

[ 'a', 'b', 'c', 1, 2, 3 ]

[ 'a', 'b', 'c', [ 1, 2, [ 3 ] ] ]

[ 'a', 'b', 'c', [ 1, [ 2, [ 3 ] ] ] ]

[ 'a', 'b', 'c', 1, 2, [ 3 ] ]

2 5

7 15

7

3

[21, 5, 13, 8, 17]

[21, 8, 17, 8, 13, 8, 17]

[21, 8, 17, 8, 17]

SyntaxError

1

b

2

c

24

28

0

SyntaxError

[1, 2, 3]

undefined

NaN

[1, 16, 81]