Apps similar to Lexy CLI include freeCodeCamp, which is free and open source. Other options are Learn X in Y minutes. Between them they cover the web and Android.
Free Code Camp's open source community help you build a job-worthy portfolio of real apps used by real people, while helping nonprofits.
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LearnXinYminutes isn’t a good way to learn your first programming language, but it’s a great way to get your feet wet with your third. It doesn’t explain any of those aforementioned oh-so-important concepts, instead expecting you to come with that knowledge at hand.
