You can preconfigure a supported integrated development environment (IDE) for assignments you create in GitHub Classroom.
You can configure Visual Studio Code as the preferred editor for assignments in GitHub Classroom.
You can configure MakeCode Arcade as the online IDE for assignments in GitHub Classroom.
As of July 13 2021, Repl.it integration is no longer available in GitHub Classroom.
You can run the code from a student assignment within the integrated development environment (IDE) that you configured for the assignment.