Function Reference
— Built-in Function: keyboard (prompt)

This function is normally used for simple debugging. When the keyboard function is executed, Octave prints a prompt and waits for user input. The input strings are then evaluated and the results are printed. This makes it possible to examine the values of variables within a function, and to assign new values to variables. No value is returned from the keyboard function, and it continues to prompt for input until the user types ‘quit’, or ‘exit’.

If keyboard is invoked without any arguments, a default prompt of ‘debug> ’ is used.