javascript-arrays

Question 1

What are arrays used for?

Answer 1

An array is used to store an ordered list of values.

Question 2

Describe array literal notation.

Answer 2

1. declare a variable
2. use square brackets
3. add the values separated by a comma

Question 3

How are arrays different from “plain” objects?

Answer 3

1. numerically indexed

2. has length property

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 provides the number of values in the array.

Question 6

How do you calculate the last index of an array?

Answer 6

Subtract 1 from the length of the array.