Data Types
๐จโ๐ผ Excellent! You now know the three fundamental data types in JavaScript.
๐ฆ Understanding types is important because:
- Different types behave differently (you can't do math on strings!)
- Knowing the type helps you predict what operations are available
- Many bugs come from unexpected types
JavaScript is "dynamically typed" - variables can hold any type, and the type
can change. This is different from languages like Java or C++ where you
declare the type upfront.
There are more types in JavaScript (like
undefined, null, object, and
symbol), but strings, numbers, and booleans are the building blocks you'll use
most often.