title: PowerShell: Difference between array notation?
body: <p>Is there a difference between these two array creation statements? So, is '@' sign optional when creating arrays?</p>
  
  <pre><code>$a = "This", "Is", "a", "cat"
  $a.GetType()
  $a | gm
  $a = @("This", "Is", "a", "cat")
  $a.GetType()
  $a | gm
  </code></pre>