Rotate string characters
Level: Beginner (score: 2)
Write a function that rotates characters in a string in either direction:
- If n is positive, move n characters from beginning to end, e.g.: rotate('hello', 2) would return "llohe".
- If n is negative, move the last n characters to the start of the string, e.g.: rotate('hello', -2) would return "lohel".
Take a look at the tests for more details. Have fun!