Table of contents
Collapse the table of content
Expand the table of content

Seq.tryFind<'T> Function (F#)

Den Delimarsky|Last Updated: 8/18/2017
1 Contributor

Attempts to find an element that satisfies a given predicate.

Namespace/Module Path: Microsoft.FSharp.Collections.Seq

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


// Signature:
Seq.tryFind : ('T -> bool) -> seq<'T> -> 'T option

// Usage:
Seq.tryFind predicate source


predicate Type: 'T ->bool

A function that evaluates to a Boolean when given an item in the sequence.

source Type: seq<'T>

The input sequence.


ArgumentNullExceptionThrown when the input sequence is null.

Return Value

Returns the first element for which the given function returns true. Return None if no such element exists.


This function is named TryFind 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

Collections.Seq Module (F#)

Microsoft.FSharp.Collections Namespace (F#)

© 2020 Microsoft