ROT13,18,47 Encoding and Decoding

Encode/Decode text in ROT13,18 and 47

What is ROT13, ROT18 or ROT47?

Definition: ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions later in the alphabet. It wraps around such that after 'Z', it continues from 'A'.
How It Works:
- For example:
  - A ↔ N
  - B ↔ O
  - C ↔ P
  - ...
  - M ↔ Z
Common Uses:
- Often used in online forums to obscure spoilers or sensitive information.
- Easy to implement and symmetric, meaning encoding and decoding are the same operation.

Definition: ROT18 extends the concept of ROT13 by shifting letters by 18 positions in the alphabet and digits by 8 positions (0-9).
How It Works:
- For letters:
  - A ↔ S
  - B ↔ T
  - ...
  - I ↔ W
- For digits:
  - 0 ↔ 8
  - 1 ↔ 9
  - 2 ↔ 0
  - ...
Common Uses:
- Less common than ROT13 but can be used to obscure text while providing a different level of obfuscation.

Definition: ROT47 shifts printable ASCII characters (from 32 to 126) by 47 positions. This includes letters, digits, and various symbols.
How It Works:
- For example, if you apply ROT47 to the character !, which has an ASCII value of 33, it shifts to ASCII value 80, resulting in the character P.
- The rotation wraps around after reaching the maximum printable ASCII character.
Common Uses:
- Used in some programming languages and applications to obscure text or code snippets.
- Provides a way to encode all printable characters, making it more versatile than just shifting alphabetic characters.

Each of these rotation algorithms provides a different method of encoding text, with varying levels of complexity and application.