Returns the gamma function value.
| Name | Type | Description |
| arg1 | number | The value for which the gamma function will be calculated. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
var ans = oFunction.GAMMA(2.7);
oWorksheet.GetRange("B2").SetValue(ans);
builder.SaveFile("xlsx", "GAMMA.xlsx");
builder.CloseFile();