javascript for array rotation -

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trying understand how code below brings number between 0-6

var dayinmili = 86400000; var weekinmili = 604800000; //datetime() returns miliseconds since thurs, jan 1 1970, need account week starting monday not thursday. while (currenttime.getday() != 1){   currenttime.settime(currenttime.gettime() - dayinmili); } //we need find number of weeks since beginning of year can //  use determine schedule rotation var weeks = math.floor(currenttime.gettime() / weekinmili ); var startpoint = weeks % 7;

the modulo operator in last line returns remainder after dividing seven. in case, result assigned startpoint going 0 - 6.


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