javascript-arrays

Question 1

What are arrays used for?

Answer 1

used for storing lists of data, numerically indexed

Question 2

Describe array literal notation.

Answer 2

square brackets [ ]

Question 3

How are arrays different from “plain” objects?

Answer 3

numerically indexed from 0 while objects aren’t numerically indexed

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 measures how long the array is; how many indexes are in an array

Question 6

How do you calculate the last index of an array?

Answer 6

array[array.length - 1]