When I am coding in C# for my player to move in space shooter rigidbody.velocity = movement; refuses to be recognized. Why? and what can i do to fix this?

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour
{
	
	void FixedUpdate()
	{
		float moveHorizontal = Input.GetAxis("Horizontal");
		float moveVertical = Input.GetAxis("Vertical");

		Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical)
		rigidbody.velocity = movement;
	}
}

The last line of code rigidbody.velocity = movement; is not recognized by unity. I followed every single step that the tutorial told me to do and I have checked the done examples and my friends have looked it over and so has my teacher. No one understands why it won’t work. I have re-created my Unity space shooter game for the second time. I do not understand what I have done wrong. PLEASE HELP!!!

Here is the tutorial i was following to move my player. I have everything he does except my game won’t run and it does not register my “rigidbody.velocity”…
Space Shooter - Unity - Moving the Player

Are you using Unity 5?

Unity 5 deprecated the .rigidbody variable, as it wasn’t obvious that it did a .GetComponent behind the scenes.

Replace this:

rigidbody.velocity = movement;

with:

GetComponent<rigidbody>().velocity = movement;

Unity should have asked you to update that automatically for you, and the error message should have mentioned that “UnityEngine.Component.rigidbody’ is obsolete: `Property rigidbody has been deprecated. Use GetComponent() instead.”