Practice JavaScript for Fun or Technical Interviews

Practice with a growing collection of programming puzzles and problems, and test your solutions online. You can use them to learn JavaScript or computer science in general, prepare for technical interviews, or just hone your programming skills while having fun.

Press "Start Coding!" below to find a random problem you haven't already solved, or pick your favourite from the "List of Problems".

  Start Coding!  List of Problems  Learn JavaScript