Returns the number of characters in a text string.
| Name | Type | Description |
| arg1 | string | The text whose length will be returned. Spaces are considered as characters. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
oWorksheet.GetRange("A1").SetValue(oFunction.LEN("Online Office"));
builder.SaveFile("xlsx", "LEN.xlsx");
builder.CloseFile();