Caesar Cipher in the command-line made in Python. Not for real-world use.

Originally made for my high school's computer science class homework assignment, but expanded upon to include extra features for fun.

• Classic caesar cipher encryption gameplay
• Customisable encryption key
• Linear substitution encryption
• Works for both capital and lowercase letters and numbers (alphanumeric)
• Cycles back if out of bounds (i.e.: 0 - 1 -> 9, 9 + 1 -> 0, A - 1 -> Z, Z + 1 -> A, a - 1 -> z, z + 1 -> a) (Does not work for symbols and other special characters)
• Symmetric decryption by inputting the negative value of encryption key integer into the same function

• Install Python 3 and download main.py. Then run main.py:

python main.py

• Open this link in your browser: https://onlinegdb.com/IRGQKi8Mt and click the Run button