Having problems with my script float error

using UnityEngine;
using System.Collections;

public class First : MonoBehaviour {
public float movementSpeed = 0.5f;
public float MouseSensitivty = 0.5f;

// Update is called once per frame
void Update ()
{

float rotLeftRight = Input.GetAxis(“Mouse X”) * MouseSensitivty

//movement
float forwardSpeed = Input.GetAxis(“Vertical”) * movementSpeed;
float sideSpeed = Input.GetAxis(“Horizontal”) * movementSpeed;
}
}

Details would be helpful. What is the problem? It seems that you are assigning local variable floats yet you aren’t really doing anything with them.