> For the complete documentation index, see [llms.txt](https://doc.open-tx.org/opentx-2-2-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-2-2-lua-reference-guide/part_iii_-_opentx_lua_api_reference/model_functions/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.

## Examples

## Example

this is a sample example

[model/setGlobalVariable-example](https://raw.githubusercontent.com/opentx/lua-reference-guide/opentx_2.2/model/setGlobalVariable-example.lua)

```lua
function foo(bar)
  local x = bar * 2
end
```

![](https://3605924701-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MRzpA5C06zjyxDVfHVi%2Fsync%2Fd851e207d40f70932976e24ec35841f3784b68c6.png?generation=1611683715220307\&alt=media)