/PROMPT=prompt-string

    Indicates that LSE should prompt you for a command (or VAXTPU
    program statement) to execute.

    The /PROMPT and /BUFFER qualifiers are mutually exclusive. If you
    specify the string parameter, you cannot specify the /PROMPT or
    /BUFFER qualifier. If you do not specify the /BUFFER qualifier but
    specify the /PROMPT qualifier, then LSE prompts you for a command
    and does not execute the current buffer.