None of the "..in 20 minutes" documents is an introduction into APL. Instead they try to demonstrate shortly what APL is able to do, so it is more like an entertaining show. They are supposed to make you curious about APL, so the presumption is that you do not have any APL installed on your machine.

All examples are written in a way that should enable you to read it. You can easily identify what is entered by an imaginary user, and what is returned by the APL interpreter.

There are several dialects available to choose from. Each one has its strength.

APL in 20 minutes with...

Read an HTML page and remove all HTML tags to get the real content of the page: [:AplIn20MinutesWithDyalogApl:Run it!]

??? [:AplIn20MinutesWithAplx:Run it!]

??? [:AplIn20MinutesWithApl2:Run it!]

??? [:AplIn20MinutesWithAplWin:Run it!]