# FunctionOptions ```csharp public sealed class FunctionOptions ``` Namespace `SharpCell` · package `SharpCell` How a function added through [Workbook.Functions](SharpCell.Workbook.md#functions) takes its arguments. ## Constructors ### FunctionOptions() ```csharp public FunctionOptions() ``` Options for any number of arguments, all passed as they are, and a function that is not volatile. ## Properties ### IsVolatile ```csharp public bool IsVolatile { get; init; } ``` Whether the function is calculated on every [Workbook.Recalculate](SharpCell.Workbook.md#recalculate-cancellationtoken), like `NOW`, instead of only when its arguments change. ### MaxArguments ```csharp public int MaxArguments { get; init; } ``` The most arguments a call may have, up to 255 as in Excel; more make the call `#VALUE!`. Default 255. ### MinArguments ```csharp public int MinArguments { get; init; } ``` The fewest arguments a call may have; fewer make the call `#VALUE!`. Default 0. ### ScalarParameters ```csharp public IReadOnlyList ScalarParameters { get; init; } ``` The 0-based positions of scalar parameters. A scalar parameter receives one value: given a range or an array, the function is called once per element and the results spill, as with Excel's own functions such as `LEN(A1:A10)`. Other parameters receive the argument as it is: a range as an array of its values.