/PROMPT[=string]

    Specifies the prompt string for DCL to use in the subprocess.
    The default is the prompt of the parent process.

    The string can consist of more than one character. All valid
    ASCII characters can be used in the string. The string must be
    enclosed in quotation marks (" ")  if it contains spaces,
    special characters, or lowercase characters. Otherwise, letters are
    automatically converted to uppercase, and leading and trailing
    spaces are removed.

    If no string is specified, the DCL default prompt string " $ "
    is used for the subprocess.