New to Raycasts, trouble using "hit"

So I've been trying to get the hang of Raycasts for about a week now (slow learner) and I've finally gotten to the point where I can make my mouse tell me whether or not it's on top of something but now I'm trying to make it minus 1 from a variable containing the "enemy's" (cube's) life. The cube has 2 life and every time I click him it should subtract one and then once his life is zero it should print: "cube is dead" but I must be writing something wrong with the "hit" part because if I comment that part out the part that tells me the thing about where the mouse is works fine. Also just a warning in advance I'm away from home and so all I have to learn with is a crappy little netbook and the box with the code formatting literally won't load... I'm so sorry and as soon as I get back (in two days, I'd also do it now but I don't know BB code which I at least think is what these forums use) I'll make sure to format it correctly on my usual computer but for now here's the code (I'm really sorry if it's a bitch to read...) EDIT: I reloaded the page a couple of times and the buttons appeared so I think the code should be fine now, here it is:

 #pragma strict
 var enemyLife : float = 2;
 
 function Update () {
     if(Input.GetMouseButton(0)){
     var hit : RaycastHit;
     var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         if(Physics.Raycast (ray, hit)){
             print("hit");
         }
         else{
             print("did not hit");
         }
     }
     if(hit.transform.tag == "enemy"){
         enemyLife = enemyLife--;
         print("tag is not the problem");
     }
     if (enemyLife == 0){ 
          print("cube is dead");
     }
 
 
 }

The part where it says:

 if(hit.transform.tag == "enemy"){
         enemyLife = enemyLife--;
         print("tag is not the problem");
     }
 

originally said:

 if(hit.collider.tag == "enemy"){
         enemyLife = enemyLife--;
         print("tag is not the problem");
     }

I watched a tutorial and decided to change it.