# Integration : Update Position

Menu Path : **Implicit > Integration : Update Position**

The **Integration : Update Position** Block updates particle positions based on their velocity.

**Note:** If the system uses the velocity attribute and you enable **Update Position** in the Update Context's Inspector, Unity implicitly adds this Block to the Context and hides it. If you add your own **Integration : Update Position** Block too, Unity updates positions twice.

![Unity adds a Update Position Block when you enable Update Position in the Update Context's Inspector.](Images/Block-UpdatePositionInspector.png)

This Block adds the particle velocity multiplied by deltaTime to the current particle position:

`position += velocity * deltaTime;`

If you disable **Update Position** in the Update Context's Inspector, the system does not change the particle **position** based on the particle's velocity attribute.

You can also add the **Integration : Update Position** Block to the Update Context manually and enable/disable it to specify when the System updates the particle position based on its velocity.

![Manually adding the Update Position Block lets you manually enable or disable it.](Images/Block-UpdatePositionBlockInContext.png)

## Block compatibility

This Block is compatible with the following Contexts:

- [Update](Context-Update.md)