### Summary:

- The `console.log()` in JavaScript is used to display output to the users. 
- JavaScript support both single-quotes as well as double-quotes.
- Variables can also be passed into the `console.log()` and they have to be separated by a comma `,`.

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The syntax of the JavaScript programming language is the set of rules that defines how a JavaScript program will be written and interpreted (by both the runtime system and by human readers).

JavaScript is dynamically typed (also called loosely typed) scripting language. That is, in javascript variables can receive different data types over time. Datatypes are basically typed of data that can be used and manipulated in a program.

Output Using Variables 2/2

解答

Summary: