javascript-arrays

Question 1

What are arrays used for?

Answer 1

a list or a set of values that are related to each other.

Question 2

Describe array literal notation.

Answer 2

The values are assigned to the array inside a pair of square brackets, and each value is separated by a comma

Question 3

How are arrays different from “plain” objects?

Answer 3

The key for each value is its index number.

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 holds the number of items in the array.

Question 6

How do you calculate the last index of an array?

Answer 6

length property minus 1.