Camera: How to stop the player turn up and down on y-axis in unity?

Question

How can I stop the character turning and tilting with the camera in the y-axis? I mean I want to be able to look up and down without changing the player position. It's ok to have it turning around on the x-axis (left and right). Here is the code:

using UnityEngine;
using System.Collections;

public class Actions : MonoBehaviour
{
        public float speedH = 2.0f;
        public float speedV = 2.0f;

        private float yaw = 0.0f;
        private float pitch = 2.0f;

        private void Update()
        {
            yaw += speedH * Input.GetAxis("Mouse X");
            pitch = Input.GetAxis("Mouse Y");

            pitch = Mathf.Clamp(pitch, -30f, 45f);

            transform.eulerAngles = new Vector3(pitch, yaw, 0.0f);

        }
        private void Start()
        {
        }
}

Answer 1

I would create an empty game object and parent the camera to it. Then I would use a script to move the obj to the player's position and then rotate the obj based on the mouse input axis.