Variables

Question 1

hold reusable data in a program and associate it with a name.

are stored in memory

Answer 1

Variables

Question 2

is the preferred way to declare a variable when it can be reassigned

Answer 2

let

Question 3

is the preferred way to declare a variable with a constant value.

Answer 3

const

Question 4

The ______ keyword returns the data type (as a string) of a value.

The ______ operator checks the value to its right and returns, or passes back, a string of the data type.

Answer 4

typeof

Question 5

is a JavaScript keyword that creates, or declares, a new variable.

Answer 5

var

Question 6

we used the += assignment operator to reassign w. We’re performing the mathematical operation of the first operator + using the number to the right, then reassigning w to the computed value.

-=, *=, and /=

Answer 6

let w = 4;
w += 1;

console.log(w); // Output: 5

Question 7

The increment operator will increase the value of the variable by 1. The decrement operator will decrease the value of the variable by 1.

Answer 7

++

–