undrestanding WorldToScreenPoint and ViewportToWorldPoint

Hello,

I have created two cubes in the scene and then attached the following code to the main camera in the scene. The Cube 's position I have selected as the target for the camera which is (0,1.95,0). When I run the program, target is (273.6, 217.4, 6.8) pixels from the left is the output for the following lines: Vector3 screenPos = cam.WorldToScreenPoint(target.position); Debug.Log("target is " + screenPos + " pixels from the left");

and target world position (1.2, 3.5, -6.6) is the output for : Vector3 p = cam.ViewportToWorldPoint(target.position); Debug.Log("target world position " + p ); Non of the above outputs match the Cube (target) position which is (0,1.95,0). Can anyone by chance explain this to me? Thank you,

public Transform target; private Camera cam;

  void Start()
 {
     cam = GetComponent<Camera>();

 }

 // Update is called once per frame
 void Update () {
     if (Input.GetKeyDown(KeyCode.Space))
     {
         //Transforms position from viewport space into world space
         Vector3 screenPos = cam.WorldToScreenPoint(target.position);
         Debug.Log("target is " + screenPos + " pixels from the left");
         //Transforms position from world space into screen space
         //which is defined in pixels
         //The bottom-left of the screen is (0,0); the right-top is (pixelWidth,pixelHeight). The z position is in world units from the camera.
         Vector3 p = cam.ViewportToWorldPoint(target.position);
         Debug.Log("target world position " + p );

     }
     
 }