[System.String[]]$compArray = @()
[System.String]$compName = ""
[System.String]$myArrayLocation = ""

function SetMultiComp
{
    $multipleCompTest = Read-Host 'Are You Wanting To Perform The Following Operation On Multiple Computers? y/n'
        switch($true)
            {
                ($multipleCompTest -match "y"){MultiCompOp}
                ($multipleCompTest -match "n"){SingleCompOp}
                default{Clear-Host; Write-Host "Invalid Answer"; SetMultiComp;}
            }
}
function MultiCompOp($myArrayLocation)
{
    Clear-Host
    $testLoc = Read-Host 'Please Give The Location Of Your Computer List'
    if((Test-Path $testLoc) -eq $true)
        {
            Set-Variable -Name "myArrayLocation" -Value "$testLoc" -Visibility Public;
            MultiCompPrep ($myArrayLocation);
        }
    else
        {
            Clear-Host; Write-Host "File Not Found"; MultiCompOp;
        }
}
function MultiCompPrep($compName)
{
    foreach($compNameInst in $myArrayLocation)
        {
            Set-Variable -Name "compName" -Value "$compNameInst" -Visibility Public;
            main ($compName);
        }
}
function SingleCompOp($compName)
{
    Clear-Host
    $compNameInst = Read-Host 'What Is The Name Of The Computer You Want To Effect';
    Set-Variable -Name "compName" -Value $compNameInst -Visibility Public;
    main ($compName);
}

function main($compName)
{
    $collItem = Get-WmiObject -Class Win32_OperatingSystem -ComputerName "$compName"
    Foreach($itemInst in $collItem)
        {
            $itemInst.Reboot()
        }
}
SetMultiComp