one two three four five format-number(,'#' ) = format-number(,'0' ) = format-number(, '.' ) = format-number(,'#.' ) = format-number(,'0.' ) = format-number(, '.#') = format-number(, '.##') = format-number(, '.0') = format-number(,'#.#') = format-number(,'0.0') = format-number(,'#.0') = format-number(,'0.#') =