#Introducing the Rot13 gem
require 'rot13'
Rot13.rotate("hello world",3)
#=> "khoor zruog"
Rot13.rotate("khoor zruog" ,-3)
#=> "hello world"
Project
#Introducing the Rot13 gem
require 'rot13'
Rot13.rotate("hello world",3)
#=> "khoor zruog"
Rot13.rotate("khoor zruog" ,-3)
#=> "hello world"