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  1. <?php
  2.  
  3. for ($x = 1; $x < 10; $x++) {
  4. echo "$x * $x = $x += $x \n";
  5. }
  6.  
Success #stdin #stdout 0.03s 25808KB
stdin
Standard input is empty
stdout
1 * 1  = 1 += 1 
2 * 2  = 2 += 2 
3 * 3  = 3 += 3 
4 * 4  = 4 += 4 
5 * 5  = 5 += 5 
6 * 6  = 6 += 6 
7 * 7  = 7 += 7 
8 * 8  = 8 += 8 
9 * 9  = 9 += 9