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Review Variables

Nice work! This lesson covered a lot of foundational skills that you will often use in your future programming endeavors.

Let's review what we learned:

  • Variables hold reusable data in a program.
  • JavaScript will throw an error if you try to reassign const variables.
  • You can reassign variables that you create with the let keyword.
  • Unset variables store the primitive data type undefined.
  • Mathematical assignment operators make it easy to calculate a new value and assign it to the same variable.
  • The + operator is used to interpolate (combine) multiple strings.
  • In JavaScript ES6, backticks (`) and ${} are used to interpolate values into a string.
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