title: regular expression to match exactly 0.[001 to 999]
body: <p>I tried <code>(^[0]?)\.*(?=.*[1-9])\d{1,3}?$</code>expression to match input value which should only accept 0.[001 to 999] , now the problem is :</p>
  
  <p>it is matching 012 or 090 etc numbers too. </p>
  
  <p>I wanted the expression to match exactly 0.[001 - 999]</p>
  
  <p>Any help is appreciated.</p>
  
  <p>Thanks,
  Sri</p>