CmdID / PowerShell / Cmdlets / Write
Write-Output
Writes the specified objects to the pipeline. PowerShell reference
From the PowerShell reference
2 parameters
Aliases echo, write
What it does
Writes the specified objects to the pipeline. Writes the specified objects to the pipeline. If Write-Output is the last command in the pipeline, the objects are displayed in the console. Write-Output sends objects to the primary pipeline, also known as the _success stream_. To send error objects to the error stream, use Write-Error. This cmdlet is typically used in scripts to display strings and other objects on the console. One of the built-in aliases for Write-Output is echo and similar to other shells that use echo. The default behavior is to display the output at the end of a pipeline. In PowerShell, it is generally not necessary to use the cmdlet in instances where the output is displayed by default. For example, Get-Process | Write-Output is equivalent to Get-Process. Or, echo "Home directory: $HOME" can be written, "Home directory: $HOME". By default, Write-Output enumerates objects in a collection. However, Write-Output can also pass collections down the pipeline as a single object with the NoEnumerate parameter.
Write-Output [-InputObject] <PSObject[]> [-NoEnumerate] [<CommonParameters>]Get objects and write them to the console
$P = Get-Process
Write-Output $PIdentifyPass output to another cmdlet
Write-Output "test output" | Get-MemberIdentifySuppress enumeration in output
Write-Output 1,2,3 | Measure-ObjectIdentifyIts page in the reference: Write-Output.
Parameters
-InputObjectSpecifies the objects to send down the pipeline. Enter a variable that contains the objects, or type a command or expression that gets the objects.-NoEnumerateBy default, the Write-Output cmdlet always enumerates its output. The NoEnumerate parameter suppresses the default behavior, and prevents Write-Output from enumerating output. The NoEnumerate parameter has no effect if the command is wrapped in parentheses, because the parentheses force enumeration. For example, (Write-Output 1,2,3 -NoEnumerate) still enumerates the array.
The NoEnumerate parameter is only useful within a pipeline. Trying to see the effects of NoEnumerate in the console is problematic because PowerShell adds Out-Default to the end of every command line, which results in enumeration. But if you pipe Write-Output -NoEnumerate to another cmdlet, the downstream cmdlet receives the collection object, not the enumerated items of the collection.
IMPORTANT: There is an issue with this switch in Windows PowerShell that is fixed in PowerShell 6.2 and above. When using NoEnumerate and explicitly using the InputObject parameter, the command still enumerates. To work around this, pass the InputObject argument(s) positionally.