How do I comment out multiple lines in Jupyter Ipython notebook?

ipython-notebook jupyter
chrisfs picture chrisfs · Apr 27, 2015 · Viewed 386.8k times · Source

I want to comment out a block of multiple lines in Jupyter (Ipython Notebook), but can't find out how to do that in this current version.
It used to be in one of the drop down menus but is no longer there.
How do you comment out multi-line blocks of code at once?

This is not a duplicate because the solution given in the following link doesn't seem to work anymore:
How can I block comment code in the IPython notebook?

Ctrl + / does nothing.

Answer

user5036413 picture user5036413 · Jun 22, 2015

Ctrl + / works for me in Chrome browser in MS Windows. On a Mac, use Cmd + / (thanks Anton K).

Please note, if / did not work out of the box, try pressing the / key on the Numpad. Credit: @DreamFlasher in comments to this question.

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