Click on this link, or look for the public username @TeleOctave on Telegram — it will appear in contacts search under ‘global results’. You will be able to send messages, without need of any number.
Compute and plot
Type an Octave expression or command and send it. The response will follow shortly, in a message originated automatically from the server.
Make computations, define and use variables, and make plots.
User-defined functions are allowed, and stored online on a separate workspace for each user.