javascript-arrays

Question 1

What are arrays used for?

Answer 1

Used to store information in a numbered index list.

Question 2

Describe array literal notation.

Answer 2

Variables assigned with [ ].

Question 3

How are arrays different from “plain” objects?

Answer 3

Arrays have an index number order and objects don’t.

Question 4

What number represents the first index of an array?

Answer 4

0.

Question 5

What is the length property of an array?

Answer 5

It returns the amount of indexed values.

Question 6

How do you calculate the last index of an array?

Answer 6

Using array.length - 1.