February 20, 2009 From the Jargon File: rot13 /rot ther’teen/
/n.,v./ [Usenet: from `rotate alphabet 13 places'] The simple
Caesar-cypher encryption that replaces each English letter with
the one 13 places forward or back along the alphabet, so that
“The butler did it!” becomes “Gur ohgyre qvq vg!” Most Usenet
news reading and posting programs include a rot13 feature. It is
used to enclose the text in a sealed wrapper that the reader
must choose to open — e.g., for posting things that might offend
some readers, or spoilers. A major advantage of rot13 over
rot(N) for other N is that it is self-inverse, so the same code
can be used for encoding and decoding. Write a function that
takes a string and returns the ROT13 version of the string; you
may assume that the character set is ascii. What is the meaning
of “Cebtenzzvat Cenkvf vf sha!” Pages: 1 2