1. What are the types of the following expressions and what do they evaluate to, and why?

• 17 \number, because its only a number
• 1 + 2 * 3 + 4 \expression, evaluates to 11 a number, because its a math expression
• 800 / 80 / 8 \expression, evaluates to 1.25 a number, because its a math expression
• 400 > 200 \boolean, evaluates to true, because you are using a comparison operator
• 1 !== 1 \boolean, evaluates to false, because you are using a comparison operator
• true || false \boolean, evaluates to true, because its a logical operator
• true && false \boolean, evaluates to false, because its a logical operator
• 20 % 6 \expression, evaluates to 2 a number, because its a math expression
• 'a' + 'b' \string, evaluates to ab, because you are adding two letters that each surrounded by ''

2. What will the following return?

• typeof 4 \number
• typeof 'hello' \string
• typeof true \boolean
• 2 === 1 || 3 === 4 \false

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

For reference, here is a truth table for the expression A && B:

|   A   |   B   | A || B |
| true  | true  | true   |
| false | true  | true   |
| true  | false | true   |
| false | false | false  |

|   A   |   B   | A & B | 
| true  | true  | true  |
| false | true  | false |
| true  | false | false |
| false | false | false |

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

For reference, here is a truth table for the expression A && !B:

| !A   | !B   | !A && !B |
| true | true |   true   |
| true | false|  false   |
| false| true |  false   |
| false| false|  false   |


|   A   |   B   |   !B   | A & B |
| true  | true  | false  | false |
| false | true  | false  | false |
| true  | false | true   | true  |
| false | false |  true  | false |

5. Write a step-by-step evaluation for the following expression (remember order of operations): 2 + 3 * 2 + 1. \2 + 3 * 2 + 1 \2 + 6 + 1 \8 + 1 \9

For reference, here is a exp of a step-by-step evaluation:

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

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

7. Write a step-by-step evaluation for the following expression: 'ca' + 'ter' + 'pi' + 'llar'. \ 'ca' + 'tar' + 'pi' + 'llar' \ 'catar' + 'pi' + 'llar' \ 'catarpi' + 'llar' \ 'catarpillar'

8. 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