gBASIC. `help` for prompt commands, `quit` to leave.
> print("a", "b")
parse error at <prompt>:1:10: syntax error, unexpected COMMA, expecting RPAREN
> print(nosuchname)
runtime error at <prompt>:1:1: undefined variable: nosuchname
> prnit("hello")
runtime error at <prompt>:1:1: invalid function call: prnit
> print("still here")
still here
> quit
Your program was not saved; `recover` will bring it back next time.
