Caesars Cipher using String

[LokiLeto]

HEY HI, I was writing this string for Caesars cipher. I tried changing the k=18 for fun. Why is it showing out of range for 18 alone…while it works fine for rest of nos.?

[whileTRUEpass]

Because you forgot the letter g, so the alphabet went from 26 to 25 characters

[LokiLeto]

ohh shoot…sorry didnt notice
Thanks

[whileTRUEpass]

It happens to the best of us
Please mark the post as solution so this thread will close.

[Sky]

In addition, instead of doing:

t = ""
t = t+something

you can just do

t = ""
t +=something

[SharkCoding]

It might also help to clean your code if you loop through each letter in your message like this:

for letter in a:
    t += alpha[(alpha.index(letter) + k) % len(alpha)]

I also changed the constant 26 to len(alpha) because that way you can add MORE characters if you wanted.