<?php $input = array(1,2,3,4,5); $output = array(); //Put your code here for ($i = 0; $i < count($input) + 1; $i++) { echo $i; $output[$i] = $input[$i] * 2; } var_dump($output); /*Output: array(5) { [0]=> int(2) [1]=> int(4) [2]=> int(6) [3]=> int(8) [4]=> int(10) } */
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