"-33"

"3-30-33"

"0-33"

undefined

error

"name" "age" "id"

"name" "age" "id"

"name" "age"

"name" "age" console.log(id)

"Геннадий" 220 251

Error

John

name: "John"

undefined

null

error

2, 4, 6

, ,

function

ничего

throw an error

Noob

Junior

Middle

Senior

TeamLead

{} 100

{} 102

{ key: 100 } 100

undefined 100

{ key: 100 } 102

21

20

-21

-20

undefined

10 20 35 15 50

[2, 7, 14.5, 4.5, 22]

[10, 20, 35, 15, 50]

2 7 14.5 4.5 22

undefined

Error

["audi", "bmw", "mercedes", "lada"]

["toyota"]

["bmw"]

["audi", "bmw", "toyota", "mercedes", "lada"]

undefined

666 666

777 666

777 777

666 777

Error

'fox brown quick The'

'The quick brown fox'

"ehT kciuq nworb xof"

'xof nworb kciuq ehT'

Error