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Add Rot13 in Ruby #5948

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Merged
pascalecu merged 1 commit into from
May 13, 2026
Merged

Add Rot13 in Ruby #5948

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17 changes: 17 additions & 0 deletions archive/r/ruby/rot13.rb
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
# frozen_string_literal: true

USAGE = "Usage: please provide a string to encrypt"

def usage!
warn USAGE
exit 1
end

def rot13(str)
str.tr("A-Za-z", "N-ZA-Mn-za-m")
end

input = ARGV.first
usage! if input.nil? || input.strip.empty?

puts rot13(input)
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