While value is x - loops

Question

Being new to PowerShell, I have this script which works when using 'switch'. I tried to get it to work using 'while' but it exits whether the value is 1 or 0.
Looking at the script below, could someone point out to me where I am going wrong!!
Your help is appreciated.
cls
Import-Module -Name ActiveDirectory
$ADpath = "OU=OU1,DC=DC1,DC=DC2,DC=DC3";
$i = 0
function yaynay(){
$i = Read-Host "`nSearch again.." "Y `tOR N";
switch -Regex ($i.ToUpper()){
"Y(es)?"{$i -eq 1}
default {$i -eq 0}
}
get-pssession | remove-pssession
}
function TableFormat(){
$x1=#{label='Full Name';Expression={$_.name};width=20},
#{label='Login Name';Expression={$_.samaccountname};width=15},
#{label='OU';Expression={(($_.DistinguishedName -split "=",4)[3] -split ",",2[0]};width=15}
$ADusr | Format-Table $x1
}
function getOut(){
Write-Host "AD Search will now exit"
exit
}
function ADUwrite (){
Write-Output "`n Cannot find user: $InputUsr"
}
while ($i -lt 1)
{
$InputUsr = Read-Host "Enter One or More Letters To Search For User"
$InputUsr1 = $InputUsr
if($InputUsr -eq ""){
write "`n No Search Criteria Entered... Exiting AD User Search"
exit
}
$InputUsr = "*"+$InputUsr+"*"
if([string]$InputUsr1 -contains "*"){
$InputUsr = $InputUsr.Replace($InputUsr, $InputUsr1)
}
$ADusr = Get-ADUser -Filter {name -like $InputUsr} -SearchBase $ADpath
$x=$ADusr.name.length
if($x -gt 0){
TableFormat
}
else{
$InputUsr = $InputUsr1.ToUpper()
ADUwrite $InputUsr
};
yaynay($i)
if($i = 1){
GetOut
}
Get-PSSession | Remove-PSSession
}

Answer 1

Several things here:
function yaynay(){
$i = Read-Host "`nSearch again.." "Y `tOR N";
switch -Regex ($i.ToUpper()){
"Y(es)?"{$i -eq 1}
default {$i -eq 0}
}
get-pssession | remove-pssession
}
The variable $i is local to this function and is never returned so its value won't affect anything happening outside.
yaynay($i)
You don't use parentheses to call a Powershell function (though you do to call a method), it won't matter much here as it will just pass the number 0 as an argument, but if you try it with more than one argument you'll end up passing an array. yaynaydoesn't have any arguments defined so it will ignore the argument anyway.
if($i = 1){
GetOut
}
assigns the value 1 to the variable $i. This is always true so you'll always call GetOut. The comparison should be if ($i -eq 1).