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  1. <?php
  2.  
  3. for ($x = 1; $x < 10; $x++) {
  4. $increase = $x * $x;
  5. echo "$x * $x = $increase.\n";
  6. }
  7.  
Success #stdin #stdout 0.01s 82880KB
stdin
Standard input is empty
stdout
1 * 1 = 1.
2 * 2 = 4.
3 * 3 = 9.
4 * 4 = 16.
5 * 5 = 25.
6 * 6 = 36.
7 * 7 = 49.
8 * 8 = 64.
9 * 9 = 81.