ForEach-Object - Powershell 4.0 CmdLet

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ForEach-Object

Short description
Performs an operation against each item in a collection of input objects.

Syntax


Description
The ForEach-Object cmdlet performs an operation on each item in a collection of input objects. The input objects can 
be piped to the cmdlet or specified by using the InputObject parameter.


Beginning in Windows PowerShell 3.0, there are two different ways to construct a ForEach-Object command.


Script block. You can use a script block to specify the operation. Within the script block, use the $_ variable to 
represent the current object. The script block is the value of the Process parameter. The script block can contain any 
Windows PowerShell script.


For example, the following command gets the value of the ProcessName property of each process on the computer.


Get-Process | ForEach-Object {$_.ProcessName}


Operation statement. You can also write a operation statement, which is much more like natural language. You can use 
the operation statement to specify a property value or call a method. Operation statements were introduced in Windows 
PowerShell 3.0.


For example, the following command also gets the value of the ProcessName property of each process on the computer.


Get-Process | ForEach-Object ProcessName


When using the script block format, in addition to using the script block that describes the operations that are 
performed on each input object, you can provide two additional script blocks. The Begin script block, which is the 
value of the Begin parameter, runs before the first input object is processed. The End script block, which is the 
value of the End parameter, runs after the last input object is processed.