(-) Symbol Used in Convert Method
<p>I was going through some C# code and came upon this line:</p>

<pre><code>Matrix[i, j] = Convert.ToInt32(grab[i, j] - '0');
</code></pre>

<p>What exactly does the ( - ) do?? </p>

<p>What would be another way to write this if there is one?</p>
