javascript-arrays

Question 1

What are arrays used for?

Answer 1

They are ordered lists made for dealing with data in an orderly fashion

Question 2

Describe array literal notation.

Answer 2

square brackets with values separated by commas

Question 3

How are arrays different from “plain” objects?

Answer 3

arrays have length properties
arrays have a set order
array indexes are called with numbers in [ ]

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 number value of the amount of items in an array. it is a true value

Question 6

How do you calculate the last index of an array?

Answer 6

you calculate the last index of an array by returning the result of
arr.length - 1

Question 6

How do you calculate the last index of an array?

Answer 6

you calculate the last index of an array by taking the length of an array and subtracting 1

arr.length - 1