/ is the top level directory of the entire system, not just for the current directory or user.

I must strongly recommend that you **do not** run the command that you asked about. `rm -rf /` would start from the top level directory of the system, and subject to user permissions, will attempt to delete every accessible file and directory on the entire system. 

To delete all of the files for the current project that you're working on, you should first change to the directory that contains that project. If you aren't sure which directory you are currently in, you can use the `pwd` command to check. Then you could use `rm -rf ./` to remove of all of the files and directories contained within the current directory. It is important to note that if multiple projects are being stored in a single directory then this command would delete all of them and would not be appropriate.
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