Coding Arrays

An array is:

• Shapes

• Eggs

• Options

• List of data

What property tells you how many items are in an array?

• length
• count
• items
• num

Why is this storage a good example of an array

• there are individual elements in the array

• there are 5 days in a week

• it protects the data from security risks

• Arrays are segmented

What is first index value of an array?

• -1

• 0

• 1

• undefine

// lockers is an array

What is lockers.length ?

• the number of elements in the array

• The height of one locker

• The sum of all lockers

• A list of long lockers

Select 2 -Two are correct:

var foods = ["rice","beans","meat"];

• Foods is a function

• foods is an array

• foods[0] == "rice"

• foods[1] == "rice"

Why are arrays used?

• Arrays store multiple data values under one name, reducing the complexity of our program
• Arrays store more data than if we were using variables
• Arrays store more data than if we were using strings

What syntax surrounds an array index zero?

• Parenthesis ( 0 )

• Curly Brackets { 0 }

• Angle Brackets < 0 >

• Square Brackets [ 0 ]

How would you change the first element in an array?

• nums[1] = "New!";
• nums = "New!";
• var nums[1] = "New!";
• nums[0] = "New!";

The push() method adds a new element to the end of an array

• true

• false