<?php

  for($x=0; $x<10; $x++) {
    echo $x."\n";
  }

  echo "\n";

  for($y=1; $y<=10; $y++) {
    echo $y."\n";
  }

?>

0
1
2
3
4
5
6
7
8
9

1
2
3
4
5
6
7
8
9
10