Jupyter notebook

Jupyter Notebook is an open-source, web-based platform that merges live code, narrative text, equations, and rich media (like visualizations) into a single, shareable computational document.

This interactive computing environment is a core tool for data science and AI development (e.g., rapid experimentation, model prototyping). It supports over 40 programming languages (including Julia, Python, and R—from which the name 'Jupyter' is derived) via pluggable kernels. Notebooks, saved in the `.ipynb` format, organize work into executable code cells and Markdown text cells, making the workflow transparent, reproducible, and highly effective for collaborative analysis and sharing results with both technical and non-technical teams.

https://jupyter.org/