title: how to get sub-expression value of regExp in awk?
body: <p>I was analyzing logs contains information like the following:</p>
  
  <pre><code>y1e","email":"","money":"100","coi
  </code></pre>
  
  <p>I want to fetch the value of money, i used 'awk' like :</p>
  
  <pre><code>grep pay action.log | awk '/"money":"([0-9]+)"/' ,
  </code></pre>
  
  <p>then how can i get the sub-expression value in ([0-9]+) ?</p>