Instantiate only if munition left

Hello guys i wanna to make that i can instantiate some item just if i got munition if i can call it so. I plan it this way
ps: this script is from my head now so some errors can be there found

I don't now how to make it don't work if clips are equal to zero
i tryed it from the machine gun script to copy some thinks but it didn't work so if somebody can help me a litlle it would be nice

 

Code (csharp):

1.  
2. var item : Transform;
3. var clips = 2;
4.  
5. function Start(){
6.    //This isn't needed as start is called just before the first update so update will be called directly after this
7.    /*if (clips>0)
8.    Update();*/
9. }
10.  
11. function Update() {
12.    if (InpuGetDown("Fire") [B] clips > 0[/B]) {
13.       Instantiate (enemy, transform.position, Quaternion indentity);
14.       clips--
15.     }
16. }
17.  

 

So all i just needed to add whas a part that will check if clips is > 0 but what is doing so i can now where to add ?

 

there are several combinations. the 3 most use ones are !, || and

These are called logic operators which can be applied to any boolean

Code (csharp):

1.  
2. //! means "not"
3. !true == false
4. !false == true
5.  

Code (csharp):

1.  
2. // || means "or"
3. true || true == true
4. true || false == true
5. false || true == true
6. false || false == false
7.  

Code (csharp):

1.  
2. //  means "and"
3. true  true == true
4. true  false == false
5. false  true == false
6. false  false == false
7.  

Code (csharp):

1.  
2. InpuGetDown("Fire")  //is a function that returns true based if the value is true
3.  
4. clips > 0 //also evaluates to a boolean that is true if clips > 0 :-)
5.  
6. so
7. if(InpuGetDown("Fire")  clips > 0) //Only if InputGetDown is true [B]and [/B] clips > 0 is true do the things contained in { }
8.