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Rooted by: Square 'n Sum (PHP Version)
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  • Best Practices
    Code 
    function square_n_sum($array_of_numbers) {
  $acc = 0;
  foreach ($array_of_numbers as $el) {
    $acc += $el ^ 2;
  }
  return $acc;
}
echo square_n_sum(array(1,2,3,5,6)); // Should return 75
echo "<br />";
echo square_n_sum(array(1,2)); // Should return 5
echo "<br />";
echo square_n_sum(array(3,4)); // Should return 25
echo "<br />";
echo square_n_sum(array(1,2,3,4)); // Should return 30
echo "<br />";
echo square_n_sum(array(1,2,3,4,5,6,7,8,9,99)); // Should return 10086
    View Run Output
  • Code
    • function square_n_sum($array_of_numbers) {
    • for ($i = 0; $i < sizeof($array_of_numbers); $i++) {
    • $array_of_numbers[$i] = $array_of_numbers[$i] ** 2;
    • $acc = 0;
    • foreach ($array_of_numbers as $el) {
    • $acc += $el ^ 2;
    • }
    • $sum_of_squared_numbers = 0;
    • for ($i = 0; $i < sizeof($array_of_numbers); $i++) {
    • $sum_of_squared_numbers += $array_of_numbers[$i];
    • }
    • return $sum_of_squared_numbers;
    • return $acc;
    • }
    • echo square_n_sum(array(1,2,3,5,6)); // Should return 75
    • echo "<br />";
    • echo square_n_sum(array(1,2)); // Should return 5
    • echo "<br />";
    • echo square_n_sum(array(3,4)); // Should return 25
    • echo "<br />";
    • echo square_n_sum(array(1,2,3,4)); // Should return 30
    • echo "<br />";
    • echo square_n_sum(array(1,2,3,4,5,6,7,8,9,99)); // Should return 10086