Operators.fst<'T1,'T2> Function (F#)
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Operators.fst<'T1,'T2> Function (F#)


Return the first element of a tuple, fst (a,b) = a.

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

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

// Signature:
fst : 'T1 * 'T2 -> 'T1

// Usage:
fst tuple


Type: 'T1 * 'T2

The input tuple.

The first value.

This function is named Fst 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

F# Core Library Versions

Supported in: 2.0, 4.0, Portable

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