Can Jupyter Notebook be converted to HTML during its execution?

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No, Jupyter Notebook cannot be converted to HTML during its execution. The output generated by the code cells can be displayed in different formats such as HTML, Markdown, LaTeX, etc. using the cell's magic functions or by specifying the cell type as Markdown.

But the actual notebook file (.ipynb) needs to be converted to HTML using a separate tool such as nbconvert after the execution is completed. This tool can convert the notebook to different formats including HTML, PDF, or Markdown.