Programming Hero is a nice blend of coding exercises and quizzes designed to test your knowledge, and it covers coding languages including HTML, CSS, JavaScript, and SQL.

There are dozens of coding apps available and many of them are useful resources for learning common coding languages. However, many of the most popular apps don’t typically cover other critical ...

4 Programming Hub Programming Hub is probably the most content-rich app on the list, offering courses on everything from coding languages to app development and software engineering.

Coding, or developing machine code, is at the heart of computers, robotics, artificial intelligence, websites, apps, games and more.