z is a single character text string indicating the character to be used to separate thousands in x. Default is the character specified in your International or Regional settings control panel. (This argument is optional.)
z ni single tabia maandishi kamba ikionyesha tabia ya kuwa na kutumika kwa tofauti maelfu katika x. Default ni tabia maalum katika mazingira International au Mkoa jopo kudhibiti yako. (Hoja hii ni ya hiari.)