Whats the best code for encrypting words/sents?

Question

hey check out my encrypting project. plz tell me how it is

http://encrypt-decrypt.blogfa.com/

Answer 1

https://code.sololearn.com/c2oD3kMGmfGQ/?ref=app

https://code.sololearn.com/c2AbgZnk20bs/?ref=app
https://code.sololearn.com/cIwpuGi5omyN/?ref=app
https://code.sololearn.com/cyA2EZAs8jiU/?ref=app