Powershell - only if statement executes despite input - powershell

Question

I'm trying to start my Powershell portfolio with and easy script that calculates Network ID or BroadcastID depending on input from the user. That being said, I can only get my if statement to run. I am unsure what I am missing here. I have tried searching this as I know I cannot be the only one to have this issue, but I am unable to find it. Any education on my error would be appreciated as it seems like a basic flaw.
Thanks!
#prompt for IP and subnet mask
$ip = Read-Host -Prompt "Enter your IP address"
$mask = Read-Host - Prompt "Enter your subnet mask"
[String]$UserDecision = Read-Host -Prompt "Enter N if you would like to calculate your Network ID or B if you would like to calculate your Broadcast address."
$splitmask=$mask.split(".")
$wildcard="$(255 - $splitmask[0]).$(255 - $splitmask[1]).$(255 - $splitmask[2]).$(255 - $splitmask[3])"
# ip and mask variable to ip addresses
$ip = [ipaddress] $ip
$mask = [ipaddress] $mask
#determine networkID
function CalculateNetID {
$networkID = [ipaddress] ($ip.Address -band $mask.Address)
#print NetworkID to console
echo "The Network id is $($networkID.IPAddressToString)"
}
function CalculateBroadcastID {
$networkID = [ipaddress] ($ip.Address -band $mask.Address)
#convert wildcard to IP addresses
$wildcard= [ipaddress] $wildcard
$broadcast = [ipaddress] $($wildcard.Address -bor $NetworkID.Address)
#print broadcast to console
echo "The Broadcast id is $broadcast"
}
if ($UserDecision -eq "N" -or "n"){
CalculateNetID
}
elseif($UserDecision -eq "B" -or "b"){
CalculateBroadcastID
}
else{
echo "Please retry and enter the character associated with the ID you would like to calculate"
}

Answer 1

Here is your problem:
$false -or 'n' # => True
As you can see, this is what's happening in your first if statement, the correct syntax for your condition should be:
if($UserDecision -eq "N" -or $UserDecision -eq "n") {
Same thing applies for the elseif.
Note that, PowerShell comparison operators are not case-sensitive by default, so the -or conditions could be just removed:
if($UserDecision -eq "n") {
You might also want to consider using a switch statement instead of chained if, elseif, else:
switch($UserDecision) {
N { CalculateNetID }
B { CalculateBroadcastID }
Default {
"Please retry and enter the character associated with the ID you would like to calculate"
}
}