> For the complete documentation index, see [llms.txt](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_iii_-_opentx_lua_api_reference/model-functions-less-than-greater-than-luadoc-begin-model/getglobalvariable.md).

# model.getGlobalVariable(index, flight\_mode)

Return current global variable value

Example:

```lua
  -- get GV3 (index = 2) from Flight mode 0 (FM0)
  val = model.getGlobalVariable(2, 0)
```

## Parameters

* `index` zero based global variable index, use 0 for GV1, 8 for GV9
* `flight_mode` Flight mode number (0 = FM0, 8 = FM8)

## Return value

* `nil` requested global variable does not exist
* `number` current value of global variable

### Notice

a simple warning or notice