What does it mean by "insert a semicolon at the end" if i already have one

 #pragma strict
 
 var TheDammage : int - 50;
 var TheDistance : float;
 
 function Update () 
 {
     if (Input.GetButtonDown("fire1")) 
     {
         var hit : RaycastHit;
         if (Physics.Raycast (transform.postition, transform.TransformDirection(Vector3.forward), hit))
         {
             Distance = hit.distance;
             hit.transform.SendMessage("ApplyDammage", TheDammage, SendMessageOptions.DontRequireReceiver);
             }
         }
   }