javascript-primitives-and-variables

Question 1

What is the purpose of variables?

Answer 1

to store data that may vary

Question 2

How do you declare a variable?

Answer 2

var variableName

Question 3

How do you initialize (assign a value to) a variable?

Answer 3

= variableVaule

Question 4

What characters are allowed in variable names?

Answer 4

letters digits and nonpunctuation, $, _ (except that a period (.))

Question 5

What does it mean to say that variable names are “case sensitive”?

Answer 5

they have to be exactly the same

Question 6

What is the purpose of a string?

Answer 6

to add text

Question 7

What is the purpose of a number?

Answer 7

for tasks that involve counting or calculating sums

Question 8

What is the purpose of a boolean?

Answer 8

true or false statements

Question 9

What does the = operator mean in JavaScript?

Answer 9

assignment

Question 10

How do you update the value of a variable?

Answer 10

variableName = update

Question 11

What is the difference between null and undefined?

Answer 11

null is intently lack of undefined is not defined

Question 12

Why is it a good habit to include “labels” when you log values to the browser console?

Answer 12

so you know what variable/scripts you are logging and helps with debugging

Question 13

Give five examples of JavaScript primitives.

Answer 13

null, undefined, number, string, boolean