> For the complete documentation index, see [llms.txt](https://docs.bdb.ai/data-science-lab-5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bdb.ai/data-science-lab-5/data-science-notebook/.ipynb-file-cells.md).

# .ipynb File Cells

A Data Science Notebook or .ipynb file contains various types of cells inside it to create Data Science experiments.

These cells contain explanatory text (Markdown), executable code,  and BDB Assist cells and their output. 

* Navigate to the Notebook tab for a repo sync project.
* Open a .ipynb file from the left side menu.
* The user can use the ***Add pre-cell*** icon to add a new code cell at the beginning of the .ipynb file.

<figure><img src="https://3817372244-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fz33KQNYQvBTgQKJBgwTz%2Fuploads%2Fjw4h7WTGQ3Kom5Hfv4DT%2Fimage.png?alt=media&amp;token=9d40bd7f-44b7-4c7c-89fa-13695d1834ee" alt=""><figcaption></figcaption></figure>

* You can add new cells by using the **+Code**, **+Markdown,** and **+Assist** options given at the bottom of the cell.

<figure><img src="https://3817372244-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fz33KQNYQvBTgQKJBgwTz%2Fuploads%2Ff0pY0JhUTFr4JFoiBaeS%2Fimage.png?alt=media&amp;token=57f33029-f409-4779-a8a3-8f77283d39bc" alt=""><figcaption></figcaption></figure>