> For the complete documentation index, see [llms.txt](https://sandyzeng.gitbook.io/kql/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sandyzeng.gitbook.io/kql/kql-quick-guide/my-favorites/let.md).

# let

```
let n = 10;  // number
let computername = "cloudway";  // string
let Day = ago(30d); // datetime 
UCClient
| where TimeGenerated > Day
| where DeviceName has computername
| take n
```

<figure><img src="https://3533425259-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fbx8yn20QqNJtsVaH9CY7%2Fuploads%2FToUHYMN4mPK2p9NV7Dca%2Fimage.png?alt=media&amp;token=cd28bd70-4f6f-4df4-b222-c287502625a7" alt=""><figcaption></figcaption></figure>