Practice reading JS code and understanding what it does!

• Understand different types in javascript
• Practice reading code & understanding boolean logic
• Learn the various operators in javascript and what they do

• Forking & cloning a repo from git
• Making a pull request

1. Fork this repository
2. Clone the forked repository to your computer
3. cd to the cloned directory
4. code . to open the repo in VSCode
5. When you are done, commit and push your work to your forked copy
6. Make a pull request on github against the original repo

For problems 1 and 2, write your answer in a comment (comments start with //) immediately below the line of code.

Example:

2 + 2
// number, 4

For problems 3-5, fill out the existing table or create a new one. See the table syntax guide

For problems 6-10, see the example in problem 6 and write your own answer below each question.

What are the types of the following expressions and what do they evaluate to?

17
//Number, 17

1 + 2 * 3 + 4 
//Number,11

800 / 80 / 8
//Number, 1.25

400 > 200
//Boolean, true

1 !== 1ty
//Boolean, false

true || false
//Boolean, true

true && false
//Boolean, true

20 % 6
//Number, 2

"a" + "b"
//String, 'ab'

What will the following return?

typeof 4
//Number

typeof "hello"
// 'string'

typeof true

2 === 1 || 3 === 4
//false

Create a truth table for the expression A || B.

For reference, here is a truth table for the expression A && B. You can fill out the last column. Don't worry about keeping the spacing exact.

Create a truth table for the expression !A && !B.

For reference, here is a truth table for the expression A && !B. You can fill out the last column. Don't worry about keeping the spacing exact.

Create a truth table for the expression !(A || B).

| A | B | !B | !(A||B) | ----- | ----- | ----- | ------- | true | true | false | falsy
| false | true | false | falsy
| true | false | true | truthy
| false | false | true | truthy

Write a step-by-step evaluation for the following expression (remember order of operations): 2 + 3 * 2 + 1. For reference, here is a exp of a step-by-step evaluation:

1 + 2 + 3 + 4
3 + 3 + 4
6 + 4
10

Write a step-by-step evaluation for the following expression (remember order of operations): 4 / 2 + 8 / 4.

4/2 + 8/4
-> 2 + 8/4
-> 2 + 2
-> 4

Write a step-by-step evaluation for the following expression: 'ca' + 'ter' + 'pi' + 'llar'.

'ca' + 'ter' + 'pi' + 'llar'
-> 'cater' + 'pi' + 'llar'
-> 'caterpi' + 'llar'
->'caterpillar'

Write a step-by-step evaluation for the following expression: 2 * 4 === 8 && 'car' + 'pool' === 'carpool'.

2 * 4 === 8 && 'car' + 'pool' === 'carpool'
->8 === 8 && 'car' + 'pool' === 'carpool'
->true && 'car' + 'pool' === 'carpool'
->true && 'carpool' === 'carpool'
->true && true 
->true

Write a step-by-step evaluation for the following expression: '1' + '2' + '3' - '1'.

'1' + '2' + '3' - '1'
->'12' + '3' - '1'
->'123' - '1'
->'123'-'1'
->'122'