javascript-arrays

Question 1

What are arrays used for?

Answer 1

When you are working with a list or a set of values that are related to each other, especially when you do not know how many items a list will contain

Question 2

Describe array literal notation.

Answer 2

Variable keyword, array name, assignment operator, opening square brackets, values separated by commas, closing square brackets

Question 3

How are arrays different from “plain” objects?

Answer 3

They key for each value is its index number rather than name

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

Tells you how many items are in the array

Question 6

How do you calculate the last index of an array?

Answer 6

array.length - 1