title: How do you multiply a matrix by itself?
body: <p>This is what i have so far but I do not think it is right.</p>
  
  <pre><code>for (int i = 0 ; i &lt; 5; i++)
  {
      for (int j = 0;  j &lt; 5; j++)
      {
          matrix[i][j] += matrix[i][j] * matrix[i][j];
      }
  }
  </code></pre>