Javascript-Arrays

Question 1

What are arrays used for?

Answer 1

Arrays are used to store a list of data

Question 2

Describe array literal notation.

Answer 2

array literal notation assigns a list of data nested in square brackets and then assigned to a declared variable

Question 3

How are arrays different from “plain” objects?

Answer 3

property keys for arrays are called indexes which represent the position of the data within the list

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

the length property of an array returns the number of values within the array.

Question 6

How do you calculate the last index of an array?

Answer 6

You take the .length of the array and subtract 1 from it and assign this expression to a declared variable