Their IDE has code highlighting and automated tests.

I really liked the structure of CoderPad, which is clear and well-organized. Having four distinct blocks greatly facilitates the work: a first block for instructions, a second for writing code, a third for the provided data or test code, and finally a fourth block to see the results. This organization makes understanding and managing tasks much smoother and more efficient.

The way they simplified the process of learning coding is beautiful they broke down all of it into simple smaller pieces which can be easily be used to apply the concepts