> For the complete documentation index, see [llms.txt](https://javascriptuse.gitbook.io/javascript/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://javascriptuse.gitbook.io/javascript/function-random.md).

# Function random :)

```javascript
	function randomString(length) {
	    var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'.split('');
	    if (! length) {
	        length = Math.floor(Math.random() * chars.length);
	    }
	    var str = '';
	    for (var i = 0; i < length; i++) {
	        str += chars[Math.floor(Math.random() * chars.length)];
	    }
	    return str;
	}
	var div = randomString(8);
	alert(div);
```