The join operator concatenates a set of strings into a single string. The strings are appended to the resulting string in the order that they appear in the command.

Syntax

String[] - Specifies one or more strings to be joined.

Delimiter - Specifies one or more characters placed between the concatenated strings. The default is no delimiter ("").

-Join <String[]>
<String[]> -Join <Delimiter>

Examples

-join ("Windows", "PowerShell", "2.0")
WindowsPowerShell2.0

The following statement joins three strings delimited by a space:

"Windows", "PowerShell", "2.0" -join " "
Windows PowerShell 2.0

The following statements use a multiple-character delimiter to join three strings:

$a = "WIND", "S P", "ERSHELL"
$a -join "OW"
WINDOWS POWERSHELL

The following statement joins the lines in a here-string into a single string. Because a here-string is one string, the lines in the here-string must be split before they can be joined.

$a = @'
a
b
c
'@

(-split $a) -join " "
a b c