Intro to Arrays - Codehs

An array is;

• Shapes
• Sizes
• Options
• Lists of data
  

What is first index value of an array?

• -1

• 0

• 1

• undefine

What surrounds an array?

• Quotations
• Curly Brackets
• Parenthesis
• Square Brackets

array = [1,2,3,4,5]
What is the length of this array?

• 5
• 4
• 0
• 125.4

Which definition below best describe an array?

• An array is a function identifier that can hold more than one parameter.

• An array is a beam of light.

• An array is a special variable, which can hold more than one value at a time.

• An array is a special function, which can hold more than one value at a time.

What is proper syntax for declaring a array in JavaScript?

• var arrayName =[ ];

• var arrayName[ ] ={ };

• array arrayName ={ };

• obj var arrayName =[ ];

Which of the variables below is an array?

• var names="array"

• var names = array;

• var names = [];

• var names[];

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

What does the pop() method do?

• removes an item from the end of the array

• adds an item to the end of the array

• explodes the array

• adds an item to the beginning of the array