title: Convert string to float with exponencial numbers
body: <p>I need to convert a string to float
  I need u-sql code.</p>
  
  <p>the script could be an exponencial like 10^2</p>
  
  <p>I tried Float.Convert but not works.</p>
  
  <p>I expect </p>
  
  <pre><code>convert(10^2) = 100
  </code></pre>