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String.concat Function (F#)

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Returns a new string made by concatenating the given strings with a separator.

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

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

// Signature:
String.concat : string -> seq<string> -> string

// Usage:
String.concat sep strings

Parameters

  • sep
    Type: string

    The separator string to be inserted between the strings of the input sequence.

  • strings
    Type: seq<string>

    The sequence of strings to be concatenated.

Exceptions

Exception

Condition

ArgumentNullException

Thrown when strings is null.

Return Value

A new string consisting of the concatenated strings separated by the separation string.

Remarks

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

Example

The following code shows how to use String.concat.

let strings = [ "tomatoes"; "bananas"; "apples" ]
let fullString = String.concat ", " strings
printfn "%s" fullString

Output

tomatoes, bananas, apples

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.String Module (F#)

Microsoft.FSharp.Core Namespace (F#)