powershell script to Check if a folder exist in SharePoint with CSOM - powershell

Question

I have a powershell script which i got somewhere from the internet that creates a folder in SharePoint. It works as it can create a folder when i tested it but, i would like like to know how can i modify this script to check if the folder that i am creating does not exist yet? can someone please help?
function CreateFolder {
param
(
$SPSite,
$SiteUrl,
$FolderName,
$User,
$Password
)
$ErrorActionPreference = "Stop"
$DocLibName = "Documents"
$FullSPPath = $SPSite+ $SiteUrl
#Connect Office 365 SharePoint Online Site
$Context = New-Object Microsoft.SharePoint.Client.ClientContext($SPSite)
$Creds = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($User,$Password)
$Context.Credentials = $Creds
$List = $Context.Web.Lists.GetByTitle($DocLibName)
$Context.Load($List)
#Get the List Root Folder
$ParentFolder=$Context.web.GetFolderByServerRelativeUrl($FullSPPath)
#Create New Folder
$Folder = $ParentFolder.Folders.Add($FolderName)
$ParentFolder.Context.Load($Folder)
$ParentFolder.Context.ExecuteQuery()
Write-host "New Folder Created Successfully!"
}

Answer 1

You can do pretty much the same as what you are doing to get the rootfolder. So if the new folder is called NewFolder in the root of your library it would look like:
$newFolder = $Context.Web.GetFolderByServerRelativeUrl("/sites/site/library/NewFolder")
$context.Load($newFolder)
$context.ExecuteQuery()
Now all you need to do is check the exists property on the Folder object:
if (!$newFolder.Exists) {
#do stuff here
}