title: Im new to unity and in was coding until i ran into a problem the math could not apply to the string to update the score
body: <p>+=100 is not working. I tried but nothing helped. If someone knows the answer please post.</p>
  <p>Error: Assets\Scripts\playerController.cs(61,50): error CS1525: Invalid expression term '+='</p>
  <pre><code>private void OnCollisionEnter(Collision collision)
  {
      if(collision.gameObject.tag == &quot;Coin&quot;)
      {
          Destroy(collision.gameObject);  
  
  
          scoreText.text = scoreText.ToString((scoreText += 1));
  
  
      }
      if (collision.gameObject.tag == &quot;Wall&quot;)
      {
          Destroy(Player);
      }
  }
  </code></pre>