Using Logic in JavaScript

Question 1

Which Operator would tell you which player won in a two player game?

Answer 1

The Comparison Operator

Question 2

What is the Comparison Operator used for?

Answer 2

It’s used for comparing two operands, like player scores.

Question 3

How many operators are there that can be used in expressions to compare two values?

Answer 3

4

Question 4

Do the 4 expressions evaluate to a boolean data type?

Answer 4

Yes

Question 5

What are the four operators that can be used in expressions to compare two values?

Answer 5

<
>
<=
>=

Question 6

What is >

Answer 6

more than

Question 7

What is <

Answer 7

less than

Question 8

What is >=

Answer 8

more than or equal to

Question 9

What is <=

Answer 9

less than or equal to

Question 10

What Will the < operator resolve to?

Answer 10

The Less Than < Operator will resolve to true is the first operand is smaller than the second operand.

Question 11

What will the > operator resolve to?

Answer 11

The More Than > Operator will resolve to true if the first operand is larger than the second operand.

Question 12

What will >= and <= resolve to?

Answer 12

They will resolve to true if the first operand is equal to.

Question 13

How do you check if two operands are of the same value?

Answer 13

Using the equality Operator ===

Question 14

What is the symbol for the Equality Operator?

Answer 14

===

Question 15

Can you use the assignment operator to compare equality in JavaScript?

Answer 15

No

Question 16

What Data Type will using the Equality Operator in Expressions Resolve to?

Answer 16

Boolean

Question 17

Can the Equality Operator be used to check data types in a code?

Answer 17

Yes it can when it is combined with the typeof operator.

Question 18

What must the Equality Operator be combined with when used to check data types in a code?

Answer 18

The typeof Operator

Question 19

What is an example of Loose Equality?

Answer 19

Where two values of two different data types can said to be equal, such as the string ‘five’ and the number 5.

Question 20

What is the symbol for the Loose Equality Operator?

Answer 20

==

Question 21

What are Logic Operators?

Answer 21

Logic Operators allow us to combine expressions and have them resolve down to one boolean data type.

Question 22

How can we compare 2 expressions?

Answer 22

We can compare two expressions with the AND operator.

Question 23

What is the symbol for the AND Operator?

Answer 23

&&

Question 24

How do you use the AND Operator?

Answer 24

You place two expressions on either side of the AND Operator. It will resolve to TRUE if both expressions on either side of the AND operator resolve to true. It will resolve to FALSE if both expressions on either side of the AND operator resolve to false. It will resolve to FALSE if one side is true and the other side is false.

Question 25

What will the OR Operator Resolve to if one of the expressions is true?

Answer 25

If at least one of the expressions is true, the OR Operator Resolves to True.

Question 26

What is the syntax for the OR Operator?

Answer 26

||

Question 27

What would true || true resolve to?

Answer 27

true

Question 28

What would true || false resolve to?

Answer 28

true

Question 29

What would false || true resolve to?

Answer 29

true

Question 30

What would false || false resolve to?

Answer 30

false

Question 31

What is the Bang Operator?

Answer 31

The Logical Operator for NOT

Question 32

What is the syntax for the Bang Operator?

Answer 32

!

Question 33

Why is it called a Bang Operator?

Answer 33

Because the punctuation ! is often referred to as a Bang in American English

Question 34

What happens when a Bang Operator is used before a Boolean?

Answer 34

The expression will evaluate to the opposite of the boolean

Question 35

What would this resolve to? !true //

Answer 35

It would resolve to false

Question 36

What would this resolve to? !false //

Answer 36

It would resolve to true.

Question 37

Which Operator can we use to check if two values are not equal?

Answer 37

We can use the strict inequality operator

Question 38

What is the symbol for the strict inequality operator?

Answer 38

!==