Stop Camera Rotation

Hi, I can’t figure out how to stop the camera rotation arrived at a certain angle.
Imagine a man stretched out which must look right and left and his view can’t go over a certain angle.
I tried many solutions and this is one of them, but it’s not exactly the effect I wanted to give.

void Update () {
		if (State2 == true)
			{
      			// Camera poiting at the ceiling	            
			Mytransform.localRotation = Quaternion.Euler(-65,0,0);	
                    // reverse axis 
			y += Input.GetAxis("Mouse X");
			x -= Input.GetAxis("Mouse Y");	
			Quaternion rotation = Quaternion.Euler(x, y, 0);       
	      	        Mytransform.localRotation *= rotation;

			if (Mytransform.localEulerAngles.y > 35f)
				{	
				Mytransform.localEulerAngles = new Vector3( x, 35f, 0);
				}
			}
	}

Use Clamp to limit the rotation values before setting localRotation. e.g.

y += Input.GetAxis("Mouse X");
y = Mathf.Clamp (y, minimumY, maximumY);

Then get rid of this bit:

 if (Mytransform.localEulerAngles.y > 35f)
{
Mytransform.localEulerAngles = new Vector3( x, 35f, 0);
}