title: In Gatling, how can I generate a random number each time a call is executed? (not using feeder)
body: <p>I need to find a way to generate a random number each time the REST call is executed.</p>
  
  <p>I have the following GET call:</p>
  
  <pre><code>    exec(http("Random execution")
        .get("/randomApi")
        .queryParam("id", getRandomId()))
    }
  </code></pre>
  
  <p>Obviously it doesn't work as the random number is only generated once and I end up with the same 
  number whenever this call is executed. I cant use the feeder option as my feeder is already huge and is generated by a 3rd party for each test. </p>