Master the Caesar Cipher with FreeCodeCamp's JavaScript Challenge 🔐

Caesars Cipher challenge from the freeCodeCamp Javascript projects
You can find this project in the freeCodeCamp javascript Data Structure and Algorithms curriculum.
find more from https://freeCodeCamp.org/learn

Source Code - https://github.com/CharlesKasasira/Js-DSA-projects-freecodecamp-/blob/master/Caesars-Cipher.js


Question:
A common modern use is the ROT13 cipher, where the values of the letters are shifted by 13 places. Thus A ↔ N, B ↔ O and so on.

Write a function that takes a ROT13 encoded string as input and returns a decoded string.

All letters will be uppercase. Do not transform any non-alphabetic character (i.e. spaces, punctuation), but do pass them on.