title: Find the largest integer by comparing two arrays
body: <p>I have two arrays with different sizes, say <code>a1[5]</code> and <code>a2[7]</code>. I want to compare the two arrays and find the largest integer.  For example</p>
  
  <p><strong>Input</strong></p>
  
  <pre><code>a1 = {52,53,48,72,20}
  a2 = {28,12,73,21,33,44,88}
  </code></pre>
  
  <p><strong>Output</strong> should be like <strong>a2, 88</strong>  where 88 is the largest number and a2 is the array where the largest number resides.</p>
  
  <p>I did search in <em>Google</em>, but couldnt get anything. Just want to know is there any builtin function available for this? or give me some logic to get the output.</p>