Powershell Get AD user group query - powershell

Question

I am trying to create a script that will allow me to enter a user name and will then present me with all the groups that the user is a member of in AD. I have the following code which works when i run it in Powershell ISE but when i just run the script in Powershell it allows me to enter the username but closes as it has queried AD. It does not print the results out on the screen.
$username = Read-Host 'Please enter Username!'
get-aduser $username -Properties memberof | select -expand memberof

Answer 1

If you are pasting the code into an already open PowerShell terminal then yes, that is definitely weird.
If you are right clicking and "Running with PowerShell" then this is the expected behaviour because the script has finished. You'll need to tell the script to stay open after it has retrieved the information. The easiest way to do this is by telling the script to wait for your input using Read-Host
$username = Read-Host 'Please enter Username!'
get-aduser $username -Properties memberof | select -expand memberof
Read-Host 'Done!'
UPDATE
Using an if statement wouldn't be feasible since it only catches terminating errors and Get-ADUser doesn't return terminating errors you would need to use a try/catch block. I over engineered this solution use to show you how it could be done using different PowerShell features :)
#Function to search for the user
function searchUser{
Param([string]$userName)
try{
Get-ADUser -Identity $userName -Properties MemberOf | Select-Object -ExpandProperty MemberOf
}catch{
return $false
}
}
#Ask the user for input until a valid username is entered
do {
$userInput = Read-Host "Enter a username: "
}until ($Output = searchUser -userName $userInput)
#Output the value from the searchUser function
Write-Host $Output