What is the meaning of ${} in powershell?
<p>I have a script where function parameters are expressed like this:</p>

<pre><code>param(
   ${param1},
   ${param2},
   ${param3}
)
</code></pre>

<p>What does it mean? I have been unable to find documentation on this.</p>

<p>What's the point of writing parameters that way instead of the more usual</p>

<pre><code>param(
    $param1,
    $param2,
    $param3
)
</code></pre>

<p>?</p>