Returns the modified Bessel function In(x).
| Name | Type | Description |
| arg1 | any | Is the value at which to evaluate the function. |
| arg2 | any | Is the order of the Bessel function. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
oWorksheet.GetRange("A1").SetValue(oFunction.BESSELI(3.5, 1));
builder.SaveFile("xlsx", "BESSELI.xlsx");
builder.CloseFile();