File extension ~ meaning
<p>I don't know is here is a proper place to ask that question, but I'm noticed that all files I created have their duplicates with <code>~</code> ending. For example:</p>

<pre><code>index.php
index.php~
home.php
home.php~
show.php
show.php~
</code></pre>

<p>and so on.</p>

<p>What does this mean? Can I delete it?</p>
