Returns the number of periods required by an investment to reach a specified value.
| Name | Type | Description |
| arg1 | number | Is the interest rate per period.. |
| arg2 | number | Is the present value of the investment. |
| arg3 | number | Is the desired future value of the investment. |
builder.CreateFile("xlsx");
var oWorksheet = Api.GetActiveSheet();
var oFunction = Api.GetWorksheetFunction();
oWorksheet.GetRange("A1").SetValue(oFunction.PDURATION("2.50%", 2000, 2200));
builder.SaveFile("xlsx", "PDURATION.xlsx");
builder.CloseFile();