Option.iter<'T> Function (F#)

Executes a function for an option value.

Namespace/Module Path: Microsoft.FSharp.Core.Option

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signature:
iter : ('T -> unit) -> 'T option -> unit

// Usage:
iter action option


  • action
    Type: 'T ->unit

    A function to apply to the option value.

  • option
    Type: 'Toption

    The input option.


The expression iter f inp executes match inp with None -> () | Some x -> f x.

This function is named Iterate in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.


Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

Version Information

F# Core Library Versions

Supported in: 2.0, 4.0, Portable

See Also


Core.Option Module (F#)

Microsoft.FSharp.Core Namespace (F#)