Get-PowerCli

function Test-PowerCLI
{
    [CmdletBinding()]
    [OutputType([boolean])]
    Param
    (
        # If PowerCLI isn't loaded, loads PowerCLI. Will throw error if it can't load.
        [Parameter(Position=0)]
        [Switch] $LoadIfFalse
    )

    Process
    {
        if(get-command connect-viserver -ErrorAction SilentlyContinue)
        {
            return $true
        } elseif ($LoadIfFalse)
        {
            Write-Verbose "PowerCLI check failed, attempting to load PowerCLI"
            add-pssnapin VMWare.vimautomation.core
            if ($?)
            {
                return $true
            } else {
                write-error "PowerCLI could not be loaded. Check your PowerCLI installation."
                return $false
            }
        } else {return $false }
    }
}