Hi abhikalrt53,

One way to do this would be to store the ranges in an array, and then use join when outputting the array.

A simpler way to do it would be to add the comma only under certain conditions, i.e. $s .= ',' if ...; - I'm not going to give away the condition because I don't think it's appropriate I do all of your (home)work for you ;-)

Hope this helps,
-- Hauke D