# up

> The green axis of the transform in world space.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.CoreModule

```csharp
public Vector3 up { get; set; }
```

### Remarks

Manipulate a GameObject’s position on the Y axis (green axis) of the transform in world space. Unlike [Vector3.up](/engine/6000.0/script-reference/unityengine/vector3/up.md), [Transform.up](/engine/6000.0/script-reference/unityengine/transform/up.md) moves the GameObject while also considering its rotation.

When a GameObject is rotated, the green arrow representing the Y axis of the GameObject also changes direction. [Transform.up](/engine/6000.0/script-reference/unityengine/transform/up.md) moves the GameObject in the green arrow’s axis (Y).

For moving the GameObject on the Y axis while ignoring rotation, see [Vector3.up](/engine/6000.0/script-reference/unityengine/vector3/up.md).

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    Rigidbody2D m_Rigidbody;
    float m_Speed;

    void Start()
    {
        //Fetch the Rigidbody component you attach from your GameObject
        m_Rigidbody = GetComponent<Rigidbody2D>();
        //Set the speed of the GameObject
        m_Speed = 10.0f;
    }

    void Update()
    {
        if (Input.GetKey(KeyCode.UpArrow))
        {
            //Move the Rigidbody upwards constantly at speed you define (the green arrow axis in Scene view)
            m_Rigidbody.velocity = transform.up * m_Speed;
        }

        if (Input.GetKey(KeyCode.DownArrow))
        {
            //Move the Rigidbody downwards constantly at the speed you define (the green arrow axis in Scene view)
            m_Rigidbody.velocity = -transform.up * m_Speed;
        }

        if (Input.GetKey(KeyCode.LeftArrow))
        {
            //rotate the sprite about the Z axis in the positive direction
            transform.Rotate(new Vector3(0, 0, 1) * Time.deltaTime * m_Speed, Space.World);
        }

        if (Input.GetKey(KeyCode.RightArrow))
        {
            //rotate the sprite about the Z axis in the negative direction
            transform.Rotate(new Vector3(0, 0, -1) * Time.deltaTime * m_Speed, Space.World);
        }
    }
}
```