javascript-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

Joining together two or more strings to create one new string.

Question 3

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

Answer 3

1) addition of numbers
2) concatenation
3) unary + (attempts to convert non-number data types to a number)

Question 4

What data type is returned by comparing two values (, ===, etc)?

Answer 4

boolean

Question 5

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

Answer 5

The addition assignment operator (+=) adds the value of the right operand to a variable and assigns the result to the variable. The types of the two operands determine the behavior of the addition assignment operator. Addition or concatenation is possible.