There may be more characters in the file. Integer Advance the marker n characters. String Get the next n characters. Integer Back up the marker n characters. Advance the marker to the next no space character.
Space characters are space, newline, formfeed and tab.
String Get the next word up to a space tab or new line. String Get the next string surrounded by the ch character. A line is terminated by a newline character. The returned line does not include the newline. NIL is returned if me is already at the end of the input.