If variable do. Switch properties

I am new to MIT app inventor and I like it very much.
However, it looks I am missing something important. Searched through samples, FAQ and I still don't get how to use a variable. There are some things what I don't understand:

  1. Design element "switch". If it is changed, it remains changed till application restart, despite it has two positions. How can I use it's position "on" and "off" ? I see only "Switch changed" block under blocks menu.
  2. I set variable = True. How can I create a conditional action like:
    if variable==True, do this; else ...

image

Thanks !

. Programming Your App to Make Decisions

and

Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook App Inventor 2 Book: Create Your Own Android Apps ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.

There is a free programming course here Course In A Box and the aia files for the projects in the book are here: App Inventor 2 Book: Create Your Own Android Apps

How to do a lot of basic things with App Inventor are described here: How do you...? .

Also look here App inventor español. Offline. Tutorial. Ejemplos. Instalación. Códigos. Juegos. Curso gratis de App inventor. and here Tutorial Index | imagnity for more tutorials including Imagnity.com List Tutorial, Mirrored - @Saj

Learn about components Component Reference
and visit the Library The MIT App Inventor Library: Documentation & Support Help>Library on the MENU

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