Module 04-04 Introduction to Javascript

Question 1

What are the two words that can be used to declare a variable in JavaScript?

Answer 1

let (changeable) and const (immutable)

Question 2

What does it mean that JavaScript is a loosely typed language?

Answer 2

It means that you don’t have to declare the datatype when initializing a variable

Question 3

Can variables change datatypes in JavaScript?

Answer 3

Yes!

Question 4

Does JavaScript use single or double quotes for strings?

Answer 4

Either, but it is best to use single

Question 5

What method makes a string out of a number in JavaScript?

Answer 5

.toString()

Question 6

How can you round to the nearest decimal point and convert to a string?

Answer 6

.toFixed(2) where 2 is the number of decimal points

Question 7

How can you parse a string into a number?

Answer 7

.parseInt(string) or .parseFloat(string)

Question 8

What is returned if a string can’t be parsed into a number?

Answer 8

NaN (not a number)

Question 9

how is a placeholder represented?

Answer 9

${ }