Basic concepts behind interactive computing in Dnotebook

In order to write interactive code/Markdown in Dnotebook, you need to understand some concepts such as cells and persistency/state. We start this section by explaining these concepts.

Cells

A cell in Dnotebook is a unit block where code or text can be written in order to be executed. The following is an example screenshot showing code and Markdown cells:

Figure 2.3 – Empty code and Markdown cells in Dnotebook

Each cell has edit buttons that can be used for different purposes, as you'll see in the following screenshot:

Figure 2.4 – Action buttons available in each cell

Now, let's understand what these buttons do:

• Run: The Run button can be used to execute a cell in order to show the output.
• Add Code: The add code button has two variants (up and down) specified by the arrow direction. They can be used to add a code cell above or below...