Hi charles, The 'J Playground' or'J in a browser' is supported by WASM so it runs the J engine on your browser. It was meant to provide a lightweight option for people to try J out and not meant to do the same work as the J engine running under the console, JQt or JHS environments. That does not mean that what you are asking for is not possible - others with more proficiency may suggest ways to accomplish the task. I would suggest though that the easiest way to accomplish the task you want is to download J and use one of the console, JQt or JHS environments that are set up to do exactly what you want.
Hope this helps and welcome to the J community. Cheers, bob > On Jul 11, 2023, at 10:35, charles holder <charleswhol...@gmail.com> wrote: > > How do I *read from/write to* a file on my computer in *J in a browse*r? > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm