title: Making an element of a 2d array a constant
body: <p>Suppose I have a 2d array as</p>
  
  <pre><code>arr[10][15];
  </code></pre>
  
  <p>Now, I want just one element of the array to be constant. I want the arr[9][8] to be fixed to 101:</p>
  
  <pre><code>arr[9][8] = 101;
  </code></pre>
  
  <p>I tried this:</p>
  
  <pre><code>const arr[9][8] = 101;
  </code></pre>
  
  <p>But the compiler gave errors.
  How can I make it constant?</p>