title: Generating function value within variable in Jmeter
body: <p>I want to use the Random function within the variable in <code>Jmeter</code> for example
  <code>${demo_variable_g${__Random(1,4,)}}</code></p>
  
  <p>I am extracting the values for <code>demo_variable</code> using regular expression extractor. I want to generate random number while using the extracted variable value. How do I do that?</p>