w12 tue afternoon

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javascript

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 */.