Powershell - delete log files older than 7 days

#----- define parameters -----#

#----- get current date ----#

$Now = Get-Date

#----- define amount of days ----#

$Days = "7"

#----- define folder where files are located ----#

$TargetFolder = "F:\folder"

#----- define extension ----#

$Extension = "*.log"

#----- define LastWriteTime parameter based on $Days ---#

$LastWrite = $Now.AddDays(-$Days)

#----- get files based on lastwrite filter and specified folder ---#

$Files = Get-Childitem $TargetFolder -Include $Extension -Recurse | Where {$_.LastWriteTime -le "$LastWrite"}

foreach ($File in $Files)

    {

    if ($File -ne $NULL)

        {

        write-host "Deleting File $File" -ForegroundColor "Red"

        Remove-Item $File.FullName | out-null

        }

    else

        {

        Write-Host "No more files to delete!" -foregroundcolor "Green"

        }

    }