Rotation Reset

I have a camera look script that it equipped to my characters body so it moves it looks like this

 { 
     
     if (Input.GetKeyUp (KeyCode.LeftControl)){ // this is changeing from sword to arrows
         if (sword == true){
         sword = false;
         range = true;
     
             }
         }
     
         
     
     if (Input.GetKeyUp (KeyCode.LeftControl)){ // this is changeing from arrows to sword
         if (range == true){
         range = false;
         sword = true;
                 
     }
         }
     
 
     if (Input.GetKeyDown (KeyCode.LeftShift))
     shift = true;
     
     if (Input.GetKeyUp (KeyCode.LeftShift))
     shift = false;
     if (shift == true){
     if (range == true){
     if (axes == RotationAxes.MouseXAndY){
     {
         //float rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse Y") * sensitivityX;
         
         rotationX += Input.GetAxis("Mouse Y") * sensitivityX;
         rotationX = Mathf.Clamp (rotationX, minimumX, maximumX);
         
 
         rotationY += Input.GetAxis("Mouse X") * sensitivityY;
         rotationY = Mathf.Clamp (rotationY, minimumY, maximumY);
         
         transform.localEulerAngles = new Vector3( rotationY,rotationX, 0);

                 }
 }
 }
 }
     if (shift == false){
         // what do i add here so i can change the rotation back to normal???
     }
         
 }

I commented where i need help. I want to get the objects rotation back to 0,0,0. as if the whole look at camera never happend.