Strings · stretch

Caesar cipher

Write caesar(text, shift) moving every lowercase letter shift places along the alphabet, wrapping from z back to a. Everything else stays as it is. caesar("abz", 1) is "bca".

ord("a") is 97 and chr(97) is "a": letters are numbers underneath.

right answers
arguments left as they should be

def caesar(text, shift):
    result = ""
    for ch in text:
        result += chr(ord(ch) + shift)
    return result

Run adds print(caesar("hello, world", 3)) after your code, to try it.

Stuck on the idea rather than the code? The String methods lesson walks through it.