Introduction to JavaScript – Review Types and Operators
Let’s take one more glance at the concepts we just learned: (each link will take you back to that section for a review.)
- Four essential data types in JavaScript include strings, numbers, booleans, and null.
- Data is printed, or logged, to the console with console.log().
- Four built-in mathematical operators include +, –, *, and /.
- JavaScript associates certain properties with different data types.
- JavaScript has built-in methods for different data types.
- Libraries are collections of methods that can be called without an instance.
- You can write single-line comments with // and multi-line comments between /* and */.
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