unity how to add force code example

Example 1: unity how to add force

public Rigidbody rb;

if(Input.GetKey(KeyCode.W))
{
	rb.AddForce(100, 0, 0);
}

Example 2: unity rigidbody addforce

rb = GetComponent();
rb.AddForce(new Vector3(1.5f,1.5f,1.5f));