Zoom in with Mouse Wheel Unity 3d

private float ZoomAmount = 0; //With Positive and negative values
private float MaxToClamp = 10;
private float ROTSpeed = 10;

void Update(){
  ZoomAmount += Input.GetAxis("Mouse ScrollWheel");
  ZoomAmount = Mathf.Clamp(ZoomAmount, -MaxToClamp, MaxToClamp);
  var translate = Mathf.Min(Mathf.Abs(Input.GetAxis("Mouse ScrollWheel")), MaxToClamp - Mathf.Abs(ZoomAmount));
  gameObject.transform.Translate(0,0,translate * ROTSpeed * Mathf.Sign(Input.GetAxis("Mouse ScrollWheel")));
}

var ZoomAmount : float = 0; //With Positive and negative values

var MaxToClamp : float = 10;

var ROTSpeed : float = 10;

function Update() {
  ZoomAmount += Input.GetAxis("Mouse ScrollWheel");
  ZoomAmount = Mathf.Clamp(ZoomAmount, -MaxToClamp, MaxToClamp);
  var translate = Mathf.Min(Mathf.Abs(Input.GetAxis("Mouse ScrollWheel")), MaxToClamp - Mathf.Abs(ZoomAmount));
  gameObject.transform.Translate(0,0,translate * ROTSpeed * Mathf.Sign(Input.GetAxis("Mouse ScrollWheel")));
}