# Jupyter Notebook

### Documentation

{% embed url="<https://jupyter-notebook.readthedocs.io/en/stable/index.html>" %}

### Starting Jupyter Notebook

Jupyter Notebook is one of the default applications on the Navigator homepage. Another way is to open Jupyter Notebook is by using Terminal; make sure that you are in the correct directory and then use the following command:

```bash
$ jupyter notebook
```

The Jupyter dashboard should open on your default web browser:

![](/files/-MIN5QJaAV3Um5KXl52f)

Navigate into your desired directory and then select *Python 3* under *New* to create a Python 3 Notework. This will open up an empty notebook, which you can then name by clicking on *Untitled*. To open a pre-existing notebook, simply click on the .iypnb file and make sure that the kernel is connected.

![](/files/-MIN6T1SKDvxMl1Oin0Y)

### Understanding Cells

Within a ***coding cell***, you can write snippets of code. When you run a cell, the code is sent to a ***kernel*** that executes it. Variables can be called or used from previously ran cells.

![](/files/-MIMup1JKZaKk2w38H_g)

To run a cell, you can either click on the *Run* button or use Ctrl/Command - Enter. A running cell is indicated by an asterisk. Once the cell has finished running, the asterisk is replaced by a number that tells you the number of cells that you have ran up to that point.&#x20;

![](/files/-MIPWa9m_f509H1vUl7_)

{% hint style="danger" %}
Be careful about the order. Cells can be executed out of order or moved around and variables can be overwritten.
{% endhint %}

***Markdown cells*** allow you to add documentation to your code. Headings can be created using hashtags: # Heading 1, ## Heading 2.

![](/files/-MIMwmGYEi8SAD2N-Hxj)

To run the markdown cell, click *Run* or use Ctrl/Command - Enter.

### Stopping Jupyter Notebook

To shutdown a running notebook, exit the notebook, select the appropriate box from the directory, and click *Shutdown.*

![](/files/-MIPT3dcc_Aw6Kc9w9JN)

To exit Jupyter Notebook, click *Quit* on the upper left corner or use Ctrl/Command - C in the Terminal.

### Limitations

There are times when coding with an IDE or text editor is preferable over using Jupyter Notebook. Here is a fun video about several limitations of Jupyter Notebook:

{% embed url="<https://www.youtube.com/watch?v=7jiPeIFXb6U>" %}


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