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  Argument
 
    file_variable    Optional; open text file (default is standard
                     file Input)
 
  Returns
 
    Boolean          True if current position is at end-of-line
                     marker or if Eof returns True, otherwise False
 
  Description
 
    The Eoln function returns a Boolean value indicating whether the
    current file position is at an end-of-line marker in an open text
    file. It checks the current position in the file. If Eoln finds
    an end-of-line, an end-of-file, the actual end of the file, or an
    empty file, it returns True. If Eoln finds any other character, it
    returns False. Eoln does not change the current file position.
 
    The end-of-file marker is the character CTRL+Z (ASCII 26). The end
    of-line marker is the carriage-return character (ASCII 13).
 
    Eoln differs from the SeekEoln function by not ignoring blanks and
    tabs in determining whether the end of a file has been reached.
    Thus, SeekEoln may be more useful than Eoln for reading text files
    of numeric data.
 
    If file_variable is not associated with a file or if the file is
    not open when Eoln is called, an I/O error occurs.
 
    To prevent a program from halting with a run-time error when an I/O
    error occurs, turn off I/O checking with {$I-} and check the return
    value of the IOResult function.