Locking Rotation object on Z axis

Posting your code might get you a more accurate answer.

aha sorry, this is what i have atm using UnityEngine; using System.Collections;

 public class TurretControl : $$anonymous$$onoBehaviour 
 {
     private int speed = 1;
     
     void Update ()
     {
         if(Input.Get$$anonymous$$ey($$anonymous$$eyCode.UpArrow))
         {
             transform.Rotate(0,0,Input.GetAxis("Vertical") * speed);
         }
         if(Input.Get$$anonymous$$ey($$anonymous$$eyCode.DownArrow))
         {
             transform.Rotate(0,0,Input.GetAxis("Vertical") * speed);
         }
     }
 }

this just allows me to use the up and down arrow keys to control the turret, i just want to be able to lock the turret @robertbu