18 lines
355 B
Text
18 lines
355 B
Text
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def rot13(plaintext)
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uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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lowercase = "abcdefghijklmnopqrstuvwxyz"
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cypher = ""
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for char in plaintext
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if uppercase .contains. char
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cypher += uppercase[uppercase[char] - 13]
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else if lowercase .contains. char
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cypher += lowercase[lowercase[char] - 13]
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else
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cypher += char
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end
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end
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return cypher
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end
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