CODE EXAMPLE FOR CSHARP

if input.get touch

if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved) {
            // Get movement of the finger since last frame
            Vector2 touchDeltaPosition = Input.GetTouch(0).deltaPosition;

            // Move object across XY plane
            transform.Translate(-touchDeltaPosition.x * speed, -touchDeltaPosition.y * speed, 0);
        }