# How to get `GET` variables in Express.js on Node.js?

In Express.js, you can access GET (query string) variables using the `req.query` object. The `req.query` object contains key-value pairs of the query string parameters in a GET request. Here's an example:

```jsx
const express = require('express');
const app = express();

// Define a route with a query string parameter
app.get('/example', (req, res) => {
  // Access query string variables using req.query
  const param1 = req.query.param1;
  const param2 = req.query.param2;

  // Do something with the parameters
  res.send(`Received parameters: param1=${param1}, param2=${param2}`);
});

// Start the server
const port = 3000;
app.listen(port, () => {
  console.log(`Server is listening on port ${port}`);
});
```

In this example:

- The route `/example` is defined to handle GET requests.
- Inside the route handler function, `req.query` is used to access the query string parameters.
- `param1` and `param2` represent the names of the query string parameters. You should replace them with the actual parameter names you expect in your application.

When a request is made to a URL like `http://localhost:3000/example?param1=value1&param2=value2`, the values of `param1` and `param2` will be accessible in the route handler through `req.query`.

For a more dynamic approach, you can also destructure the properties directly from `req.query`:

```jsx
app.get('/example', (req, res) => {
  const { param1, param2 } = req.query;

  res.send(`Received parameters: param1=${param1}, param2=${param2}`);
});
```

This way, you directly extract the properties you need from `req.query` into variables.