RE: [PHP] math calculations query

initialize a total variable to 0. every time you print out a price, $total += $currentprice. at the end you'll have the total. am i misunderstanding you? -jack -----Original Message----- From: sean@networkdata.co.uk [mailto:sean@networkdata.co.uk] Sent: Thursday, April 26, 2001 3:43 PM To: php-general@lists.php.net Subject: Re: [PHP] math calculations query oh, I am such a bone head.. but the actual question was how to calculate the totals. i have a column on my form that says $qry["price"]*$qry["quantity"] which gives me a column of totals but my question is how to total that up??? any ideas? "David VanHorn" <dvanhorn@cedar.net> wrote in message news:4.3.2.7.2.20010426141815.00c6bc30@mail.cedar.net... > At 08:31 PM 4/26/01 +0100, sean@networkdata.co.uk wrote: > >hi all, > > > >i have a script which selects description, price and quantity from a mysql > >table. > > > >i have displayed the results on a page in the form of description, price, > >quantity but I was wondering how best to go about calculating a total total, > >ie. sum of quantitys multiplied by sum of prices. > > Generally, that's not how you do that. > You'd calculate "extended" prices based on quantity of item and price, then > add all extended prices. > > 1 Thingy $5 Ext= $5 > 2 SuperThingy $3 Ext=$6 > > Total is $11 > > As opposed to > 3 * $8 by the method you described. > > > -- > Dave's Engineering Page: http://www.dvanhorn.org > Where's dave? > http://www.findu.com/cgi-bin/find.cgi?kc6ete-9 > > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net For additional commands, e-mail: php-general-help@lists.php.net To contact the list administrators, e-mail: php-list-admin@lists.php.net