Thread: open and edit file at command prompt

Hi there

I would like to be able to open a file and display at the command prompt, and then be able to edit the screen data, and save it back out to the file. Is this possible?
The reason I am doing it at the command prompt is because this is a uni assignment. Of course I have no problem in opening a text file to the screen and saving data on the screen out to a file, my problem is editing data loaded from a file on the screen.

Any help would be appreciated.

Thanks.