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<?php // Holds the diffs $diffContainer = array(); // Some numbers? $numbers = array(16,8,4,2); foreach($numbers as $currentNumberLevel => &$number) { // There is no difference between zero and the number before if($currentNumberLevel === 0) { continue; } // Calculate the diffs // > Addition $diffContainer['addition'][$currentNumberLevel] = $numbers[($currentNumberLevel - 1)] + $number; // > Subtraction $diffContainer['subtraction'][$currentNumberLevel] = $numbers[($currentNumberLevel - 1)] - $number; // > Multiplication $diffContainer['multiplication'][$currentNumberLevel] = $numbers[($currentNumberLevel - 1)] * $number; // > Division $diffContainer['division'][$currentNumberLevel] = $numbers[($currentNumberLevel - 1)] / $number; }
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