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int fgets STDIN
  1. <?php
  2. $n = 0;
  3. $i = 0;
  4. $s = 0;
  5. echo ("Please enter value for Nn");
  6. $n = (int)fgets(STDIN);
  7. $s = 0;
  8. for ($i = 1; $i <= $n; $i += 1) {
  9.     if ($i % 2 == 0) {
  10.         $s = $s + $i;
  11.         echo ("Current value i=" . $i . " S=" . $s . "n");
  12.     }
  13. }
  14. echo ("Final result sum is S=" . $s);
  15. ?>
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