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Ilya Kantor 2017-03-23 11:06:57 +03:00
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1-js/02-first-steps/01-hello-world/article.md
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# Hello, world!
The tutorial that you're reading is about the core JavaScript, that is platform-independant. So you'll be able to learn how to use Node.JS and other things based on that knowledge.
The tutorial that you're reading is about the core JavaScript, that is platform-independant. Further on you will be able learn Node.JS and other platforms that use it.
But we need a working environment to run our scripts, and, just because this book is online, the browser is probably a good choice. We'll use a few browser-specific commands like `alert`, but will keep their amount to the minimum.
But we need a working environment to run our scripts, and, just because this book is online, the browser a good choice. We'll keep the amount of browser-specific commands (like `alert`) to minimum, so that you don't spend time on them if you plan to concentrate on another environment like Node.JS. From the other hand, browser details are explained in detail in the [next part](/ui) of the tutorial. So
So first let's see how to attach a script to the webpage. For server-side environments you can just execute it with a command like `"node my.js"` for Node.JS.
So here we'll see how to attach a script to the webpage, that's simple enough. For server-side environments you can just execute it with a command like `"node my.js"` for Node.JS.
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1-js/02-first-steps/02-structure/article.md
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Here JavaScript interprets the line break as an "implicit" semicolon. That's also called an [automatic semicolon insertion](https://tc39.github.io/ecma262/#sec-automatic-semicolon-insertion).
**In most cases a newline implies a simicolon. But "in most cases" does not mean "always"!**
**In most cases a newline implies a semicolon. But "in most cases" does not mean "always"!**
There are cases when a newline does not mean a semicolon, for example: