Question

How can I start a script over again? I have 3 switches and I want them to revert back to the beginning of the script.

Import-Module ActiveDirectory
Write-Host "--Please Login using a.account--"
#login
$credential = Get-Credential
#Main
Write-Host "--Remote Computer Rename v2.0--"
Write-Host "1. Query AD (Outputs to a text file)"
Write-Host "2. Quick computer rename"
Write-host "3. Quit"
$choice=Read-Host "Chose a number to continue"

#AD Query for computer
switch ($choice)
{
 1 {
Write-Host "--Enter first five characters of computer name or full computer name i.e.     USCLT--"
$cn=Read-Host 'Computer name'
$out="$cn*"
Get-ADComputer -Filter 'SamAccountName -like $out' >> c:\myscripts\dsquery.txt
Write-Host "Query complete.  See dsquery.txt saved to Desktop."
}

...rest of my code.

So after See dsquery.txt saved to Desktop.” I want it to go back to write-host portion.

Answer 1

My personal favorite for checking user input is the do { } until () loop. Here is your code with the added loop, this will accomplish what your looking for:

Import-Module ActiveDirectory
Write-Host "--Please Login using a.account--"
#login
$credential = Get-Credential
#Main
do {
Write-Host "--Remote Computer Rename v2.0--"
Write-Host "1. Query AD (Outputs to a text file)"
Write-Host "2. Quick computer rename"
Write-host "3. Quit"
$choice=Read-Host "Chose a number to continue"

#AD Query for computer
switch ($choice)
{
 1 {
Write-Host "--Enter first five characters of computer name or full computer name i.e.     USCLT--"
$cn=Read-Host 'Computer name'
$out="$cn*"
Get-ADComputer -Filter 'SamAccountName -like $out' >> c:\myscripts\dsquery.txt
Write-Host "Query complete.  See dsquery.txt saved to Desktop."
}

...rest of my code.
} until ($choice -eq 3)

This is a pretty unique strategy in my opinion. I took this from Jerry Lee Ford’s book : Microsoft Windows PowerShell Programming for the absolute beginner

you can read more about these and every other loop in powershell here : http://www.powershellpro.com/powershell-tutorial-introduction/logic-using-loops/