Rot x ASCII en-/decryption

Maybe add Checkbox to convert letters Only? (Check if 65 - ... & 97 - ....) --> Done

Encryption with:

Decryption with: Decrypt

Alphabet Only? (special chars get rotated in any case i.e. ä,ü,ö...)

Result:

copyright © Marc Wenzelewski coded spontaneously in ~ 2,5h on 02.10.2020