how to make movement in c sharp code example

Example: movement script c#

private float speed = 2.0f;
public GameObject character;

void Update () {

	if (Input.GetKey(KeyCode.RightArrow)){
		transform.position += Vector3.right * speed * Time.deltaTime;
	}
	if (Input.GetKey(KeyCode.LeftArrow)){
		transform.position += Vector3.left * speed * Time.deltaTime;
	}
	if (Input.GetKey(KeyCode.UpArrow)){
		transform.position += Vector3.up*speed* Time.deltaTime;
	}forward;
	if (Input.GetKey(KeyCode.DownArrow)){
		transform.position += Vector3.down *speed * Time.deltaTime;
	}
}