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Operators.defaultArg<'T> Function (F#)

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Used to specify a default value for an optional argument in the implementation of a function.

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

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

// Signature:
defaultArg : 'T option -> 'T -> 'T

// Usage:
defaultArg arg defaultValue

Parameters

  • arg
    Type: 'T option

    An option representing the argument.

  • defaultValue
    Type: 'T

    The default value of the argument.

Return Value

The argument value. If it is None, the defaultValue is returned.

Remarks

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

Platforms

Windows 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2

Version Information

F# Runtime

Supported in: 2.0, 4.0

Silverlight

Supported in: 3

See Also

Reference

Core.Operators Module (F#)

Microsoft.FSharp.Core Namespace (F#)