Making calculations with longer numbers? You can improve readability by using underscores (<code>_</code>) in numeric primitives:
<pre><code class="lang-js">// Hard to read:
Math.floor(Math.random() * 1000000); // 337083

// Better
Math.floor(Math.random() * 1_000_000); // 337083

1_000_000 === 1000000 // true
</code></pre>
The underscore doesn't have to be placed where a comma would go - it can be used anywhere in the number except at the very beginning or end. Just a small way to improve your code and prevent errors!
<hr />
Check out more #JSBits at my blog, <a target="_blank" href="http://jsbits-yo.com/">jsbits-yo.com</a>. Or follow me on <a target="_blank" href="https://twitter.com/JS_Bits_Bill">Twitter</a>!

Making calculations with longer numbers? You can improve readability by using underscores (`_`) in numeric primitives:

```js
// Hard to read:
Math.floor(Math.random() * 1000000); // 337083

// Better
Math.floor(Math.random() * 1_000_000); // 337083

1_000_000 === 1000000 // true
```

The underscore doesn't have to be placed where a comma would go - it can be used anywhere in the number except at the very beginning or end. Just a small way to improve your code and prevent errors!

----------
Check out more #JSBits at my blog, [jsbits-yo.com](http://jsbits-yo.com/). Or follow me on [Twitter](https://twitter.com/JS_Bits_Bill)!

JS Bits with Bill

JS Bits with Bill

Underscores as number separators