title: Regular expression for thousand separator without decimal point
body: <p>I have regular expression which is working fine for decimal .
  In below expression I want to remove decimal match to validate Integer</p>
  
  <pre><code>^-?(\d*)(,\d{1,3})*(?:[,]|([.]\d{0,2}))?$
  </code></pre>
  
  <p>Valid Match : 1,000 &amp; 111,  &amp; -1000,00</p>
  
  <p>Invalid Match :  -,1  &amp; 1,,,,</p>