JS operators and expressions

Question 1

What data type is returned by an arithmetic operation?

Answer 1

number

Question 2

What is string concatenation?

Answer 2

when you join two or more strings together

Question 3

What purpose(s) does the + plus operator serve in JavaScript?

Answer 3

adds numbers and concatenates strings

Question 4

What data type is returned by comparing two values (less than sign, greater than sign, strictly equal)?

Answer 4

boolean

Question 5

What does the += “plus-equals” operator do?

Answer 5

adds the value of the right side of the operation to a variable and assigns the new result back to the variable.

result += 2

is the same as

result = result + 2