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

string concatenation is inlcuding the value of a variable in-line with a string , a tring with a number or combining two or more strings.

Question 3

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

Answer 3

In JavaScript, the + operator serves multiple purposes. It can be used as an arithmetic operator to perform addition, as well as a string concatenation operator to combine or join strings.

Question 4

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

Answer 4

a boolean

Question 5

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

Answer 5

+= is the same as var sum = sum + {value} - adds value on right hand side of the operator to the varable and then stores it back to the variable.