How to pass list of value in powershell script

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PowerShell

Here iam monitoring cpu usage memory by loading txt file. In which txt file contains list of machine name. But i need to pass as array or list to scripts instead of reading from txt file.

$Username = 'a';
$Password = 'aa'
$pass = ConvertTo-SecureString -AsPlainText $Password -Force
$Cred = New-Object System.Management.Automation.PSCredential -ArgumentList $Username,$pass
Invoke-Command -ComputerName  qachdc -ScriptBlock {


$SFile = "C:\f\ServerList.txt"  

$ServerList = Get-Content $SFile -ErrorAction SilentlyContinue 

$Result = @() 

ForEach($computername in $ServerList) 

{
  

$AVGProc = Get-WmiObject -computername $computername win32_processor | 

Measure-Object -property LoadPercentage -Average | Select Average

$OS = gwmi -Class win32_operatingsystem -computername $computername |

Select-Object @{Name = "MemoryUsage"; Expression = {"{0:N2}" -f ((($_.TotalVisibleMemorySize - $_.FreePhysicalMemory)*100)/ $_.TotalVisibleMemorySize) }}

$vol = Get-WmiObject -Class win32_Volume -ComputerName $computername -Filter "DriveLetter = 'C:'" |

Select-object @{Name = "C PercentFree"; Expression = {"{0:N2}" -f  (($_.FreeSpace / $_.Capacity)*100) } }

   

$result += [PSCustomObject] @{ 

        ServerName = "$computername"

        CPULoad = "$($AVGProc.Average)%"

        MemLoad = "$($OS.MemoryUsage)%"

        CDrive = "$($vol.'C PercentFree')%"

    }

    $Outputreport = ""
    $OFS = "`r`n"
    Foreach($Entry in $Result) 

        { 
          $Outputreport += $OFS + $($Entry.Servername) + ";" +  $($Entry.CPULoad) + ";" + $($Entry.MemLoad) + ";" + $($Entry.Cdrive)
         
        }

       

}
Write-Host $Outputreport
} -credential $Cred 

What I have tried:

i have tried above code. But iam new to scripting concepts, I dont no how to pass as list or array instead of reading from txt file.