type something in and set the NrAdder variable to how many letters do you want each to be changed with (ex: if you say "a" it will encrypt it to 1 because it's the first letter of the alphabet and if the NrAdder would be 13 then it will do 1 + 13 so it will be translated to n, the 14th letter of the alphabet)
made this in 10 min cuz i was bored. also good for decrypting messages encrypted in Caesar 13 (some old secret language) by setting the NrAdder to 13. btw DO NOT USE CHARACTERS THAT ARE NOT LETTERS NOR NUMBERS