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
1 + 6 + 4
7 + 4
11

800 / 80 / 8
10/ 8
1.25

400 > 200
true

1 !== 1
false
true || false
true
true && false
false
20 % 6
2
"a" + "b"
ab

What will the following return?

typeof 4
number
typeof "hello"
string
typeof true
boolean
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 | !A && !B | !(A || B) | ----- | ----- | ----- | ------- | -------- |-------| | true | true | false | false | false | false | | false | true | false | false | false | false | | true | false | true | true | false | false | false | false | true | false | false | true

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

2 + 3 * 2 + 1
2 + 6 + 1
8 + 1
9

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'
8 === 8 && 'carpool' === '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'
'122'