title: Using Grep in Unix to find dollar values from $10.00-$99.99
body: <p>Trying to write the correct <code>grep</code> command to search a file for occurrences of any dollar values ranging from <code>$10.00</code> to <code>$99.99</code>.  My main concern is if the <code>$</code> symbol needs an escape <code>\</code>.  So far I have this</p>
  
  <pre><code>grep '$[1-9][0-9]\.[0-9][0-9]' file
  </code></pre>
  
  <p>just wondering if it should be </p>
  
  <pre><code>grep '\$[1-9][0-9]\.[0-9][0-9]' file
  </code></pre>
  
  <p>instead.  </p>