Generate Random Whole Numbers with JavaScript Function

function randomWholeNum(max) {
  max = max + 1;
  var result_html = document.getElementById("result");
  var random_number = Math.floor(Math.random() * max);
  result_html.innerHTML = random_number;
  return random_number;
}

HTML

<div id='result' class='mb-3 alert alert-primary'>..</div>
<button onclick='randomWholeNum(20);' class='btn btn-primary mb-1'>Generate a Random Number Between 0 - 20</button> <button onclick='randomWholeNum(200);' class='btn btn-primary mb-1'>Generate a Random Number Between 0 - 200</button> <button onclick='randomWholeNum(2000);' class='btn btn-primary mb-1'>Generate a Random Number Between 0 - 2000</button>

Result