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This application teaches you the bases of programming in different programming languages, at the end of the course you will receive a certificate of completion valid in your curriculum.
is available for both android and iOS devices, totally free
SoloLearn page: http://ow.ly/HGdk30eRo7C
programming languages:
Python.
Java.
C++.
SQL.
PHP.
CSS.
HTML.
JQUERY.
Ruby.
Swift.
C#.
JavaScript.