PowerShell/Scripts/write-rot13.ps1

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<#
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.SYNOPSIS
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Writes text encoded or decoded with ROT13
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.DESCRIPTION
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write-rot13.ps1 [<text>]
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.EXAMPLE
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PS> ./write-rot13 "Hello World"
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.NOTES
Author: Markus Fleschutz · License: CC0
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.LINK
https://github.com/fleschutz/PowerShell
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#>
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param([string]$text = "")
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function ROT13 { param([string]$text)
$text.ToCharArray() | ForEach-Object {
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if ((([int] $_ -ge 97) -and ([int] $_ -le 109)) -or (([int] $_ -ge 65) -and ([int] $_ -le 77))) {
$Result += [char] ([int] $_ + 13);
} elseif ((([int] $_ -ge 110) -and ([int] $_ -le 122)) -or (([int] $_ -ge 78) -and ([int] $_ -le 90))) {
$Result += [char] ([int] $_ - 13);
} else {
$Result += $_
}
}
return $Result
}
try {
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if ($text -eq "" ) { $text = read-host "Enter text to write" }
$Result = ROT13 $text
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write-output $Result
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exit 0 # success
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} catch {
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"⚠️ Error: $($Error[0]) ($($MyInvocation.MyCommand.Name):$($_.InvocationInfo.ScriptLineNumber))"
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exit 1
}