$xxx variables are set once at the beginning of a level
%xxx variables are set on every occurence inside a level

HTML RESULT 
{set $range = 10}

<table border=1>

  <tr>
    <th>Level</th>
    <th>Occurence</th>
  </tr>

  {sequence range='1..5', $abc=$range, %xyz=$range} 
        <tr>
          <td>{$abc}</td>
          <td>{$xyz}</td>
        </tr>
  {/sequence}

</table>
Level Occurence
10 1
10 2
10 3
10 4
10 5 
<table border=1>

  <tr>
    <th>Name</th>
    <th>Salary</th>
    <th>Bonus</th>
    <th>Total</th>
  </tr>
  
  {staff %total = $salary + $bonus}

    <tr align="right">
      <td align="left">{$name}</td>
      <td>{$salary | %.2f}</td>
      <td>{$bonus | %.2f}</td>
      <td>{$total | %.2f}</td>
    </tr>

  {/staff}
 
</table>
Name Salary Bonus Total
joe 1000.00 500.00 1500.00
jim 2000.00 400.00 2400.00
john 3000.00 300.00 3300.00
jack 4000.00 200.00 4200.00
jerry 5000.00 100.00 5100.00