> 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/setglobalvariable.md).

# model.setGlobalVariable(index, flight\_mode, value)

Sets current global variable value. See also model.getGlobalVariable()

## Parameters

* `index` zero based global variable index, use 0 for GV1, 8 for GV9
* `flight_mode` Flight mode number (0 = FM0, 8 = FM8)
* `value` new value for global variable. Permitted range is from -1024 to 1024.

## Return value

none

### Notice

Global variable can only store integer values, any floating point value is converted into integer value by truncating everything behind a floating point.