title: How to print the longest word in a file by using combination of grep and wc
body: <p>iam trining to find the longest word in a text file.
  i tried it and find out the no of characters in the longest word in a file 
  by using the command</p>
  
  <pre><code>wc -L
  </code></pre>
  
  <p>i need to print the longest word By using this number and grep command .</p>