i have code :

```
<?php
$number =9;
$number2 = $number / 2;
    for ($b=0; $b<=$number2; $b++){
        for ($i=$number; $i>=1; $i--){
            echo $i;
        }
        echo "<br/>";
        for ($a=1; $a<=$number; $a++)
        {
        echo $a;
    }
    echo "<br/>";
}
?>

```

I want the result like this . 

```
987654321
123456789
987654321
123456789
987654321
123456789
987654321
123456789
987654321

```

why if i put odd number like 9 , why always the result 10 loop ?