# Border elements in JavaScript

`shift` `pop` `push` `unshift`

Given the following array:

`[1, 2, 3]`

Display the first element of this array.

Given the following array:

`[1, 2, 3]`

Display the last element of this array.

Given the following array:

`[1, 2, 3]`

Add the elements `4`, `5`, `6` to its end.

Given the following array:

`[1, 2, 3]`

Add the elements `4`, `5`, `6` to its start.

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