Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
  <script>
    let maxHealth = 200;
    var currentHealth = 50;
    //var healingFactor = 10;

    document.write(currentHealth + "</br>");

    function healByAmount(healAmount){
      let finalHealth = currentHealth + healAmount;
      currentHealth = finalHealth > maxHealth ? maxHealth : finalHealth;

      function calculateHealthPercentage(HealthPercent){
        HealthPercent = (currentHealth / maxHealth) * 100;
        return HealthPercent;
      }

      return (calculateHealthPercentage());
    }


    //function heal(){
      //let finalHealth = currentHealth + healingFactor;
      //currentHealth = finalHealth > maxHealth ? maxHealth : finalHealth;
    //}
    //healByAmount(20);
    let percentHealth = healByAmount(49);
    percentHealth
    document.write(percentHealth + "</br>");


  </script>


</body>
</html>