title: When a particular key is not present in a dictionary
body: <p>From a Dictionary <code>input_dict={'Name': 'Monty', 'Profession': 'Singer' }</code>, get the value of a key <code>Label</code> which is not a part of the dictionary, in such a way that Python doesn't hit an error. If the key does not exist in the dictionary, Python should return <code>NA</code>.</p>
  <p>Sample Input:</p>
  <pre><code>{'Name': 'Monty', 'Profession': 'Singer' }
  </code></pre>
  <p>Sample Output:</p>
  <pre><code>NA
  </code></pre>