title: How to Sum a column in AWK?
body: <p>My file is delimited by a comma which gives 64 columns. I extracted the field as shown below:</p>
  
  <pre><code>awk '{split($0,a,",");  print a[57]}'
  </code></pre>
  
  <p>How can I compute the sum of the values in columns 57 with my command?</p>