Unity Example of border limits

border_limits.cs

        if (transform.position.y > 5.7f)
        {
            transform.position = new Vector3(transform.position.x, 5.7f, 0);
        }
        else if (transform.position.y < -5.7f)
        {
            transform.position = new Vector3(transform.position.x, -5.7f, 0);
        }
        else if (transform.position.x > 11.35f)
        {
            transform.position = new Vector3(-11.35f, transform.position.y, 0);
        }
        else if (transform.position.x < -11.35f)
        {
            transform.position = new Vector3(11.35f, transform.position.y, 0);
        }