Before you keep reading...

Runestone Academy can only continue if we get support from individuals like you. As a student you are well aware of the high cost of textbooks. Our mission is to provide great books to you for free, but we ask that you consider a $10 donation, more if you can or less if $10 is a burden.

Support Runestone Academy Today

4.1. Reveals

This content starts out hidden. It’s visibility can be toggled by using the Show/Hide button.

The reveal block can also contain other directives (ActiveCode, Disqus block, etc):

print ("Hello, world")

Before you keep reading...

Making great stuff takes time and $$. If you appreciate the book you are reading now and want to keep quality materials free for other students please consider a donation to Runestone Academy. We ask that you consider a $10 donation, but if you can give more thats great, if $10 is too much for your budget we would be happy with whatever you can afford as a show of support.

Support Runestone Academy Today

.. reveal:: revealid1
    :showtitle: Reveal Content
    :hidetitle: Hide Content

    This content starts out hidden. It's visibility can be toggled by using the Show/Hide button.

    The reveal block can also contain other directives (ActiveCode, Disqus block, etc):

    .. activecode:: ac11

        print ("Hello, world")

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