CameraController (Learning Unity)

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CameraController : MonoBehaviour
{
    public Transform target;
    private float xRot;
    public float mouseSensitivityX = 100f;
    public float mouseSensitivityY = 100f;
    public Transform cam;
    // Start is called before the first frame update
    void Start()
    {

    }

    private void Update()
    {
        transform.Rotate(Vector3.up * Input.GetAxis("Mouse X")* mouseSensitivityX * Time.deltaTime);
        xRot -= Input.GetAxis("Mouse Y") * mouseSensitivityY * Time.deltaTime;
        xRot = Mathf.Clamp(xRot, -10, 15);
        cam.localRotation = Quaternion.Euler(xRot, 0, 0);
    }

    // Update is called once per frame
    void LateUpdate()
    {
        transform.position = target.position;
        //transform.rotation = target.rotation;
    }
}