Last time, we looked at the rules for naming variables. Remember, variables are like labeled boxes for storing information.

If we write: let playerLevel = 5;

Engagement Message

What value is stored inside the playerLevel variable?

Let's quickly recap a key naming rule: variable names cannot contain spaces.

Engagement Message

So, if you wanted a variable for a user's age, would user age be a valid name in JavaScript?

An important thing about variables is that their values can change! You can update the value stored in a variable by assigning a new value to it.

Example:

Engagement Message

What value does the level variable hold after the third line (level = 2;) is run?

Variables are especially useful when working with numbers because you can perform calculations with them.

JavaScript uses familiar symbols for math: + for addition, - for subtraction, * for multiplication, and / for division.