nodejs/doc/api/synopsis.md

# Usage

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`node [options] [v8 options] [script.js | -e "script" | - ] [arguments]`

Please see the [Command Line Options][] document for information about
different options and ways to run scripts with Node.js.

## Example

An example of a [web server][] written with Node.js which responds with
`'Hello World'`:

```js
const http = require('http');

const hostname = '127.0.0.1';
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World\n');
});

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});
```

To run the server, put the code into a file called `example.js` and execute
it with Node.js:

```txt
$ node example.js
Server running at http://127.0.0.1:3000/
```

All of the examples in the documentation can be run similarly.

[Command Line Options]: cli.html#cli_command_line_options
[web server]: http.html