Jupyter Notebook is a web-based interactive computing platform used for developing/editing programs.

Jupyter is a browser-based editing/developing program for interactive working. It is a computational notebook which provides a fast interactive environment for prototyping and explaining code. The facility for exploring and visualizing the data, and sharing etc. is all possible within Jupyter.
Salient Features are:
• In-browser editing for code, with automatic syntax highlighting,
indentation is available.
• The ability to execute code from the browser, with the results of
computations attached to the code which generated them.
• Displaying the result of computation using rich media representations,
such as HTML, LaTeX, PNG, SVG, etc. For example, publication-quality
figures rendered by the [matplotlib] library, can be included inline.
• In-browser editing for rich text using the [Markdown] markup language,
which can provide commentary for the code, is not limited to plain text.
• The ability to easily include mathematical notation within markdown
cells using LaTeX, and rendered natively by MathJax.