https://stackoverflow.com/questions/51940104/python-for-i-in-range2-2-printi-what-does-i-variable-contain-it-doesnt-co

i think this website explain it

I also was stumped by this, but understand now. Range returns a sequence between two numbers, so if there is no step/sequence between the two numbers, then there is subsequent number to return. Therefore, only one value is returned.

Do you know how range works? Do you know you can copy the code and test it yourself, on your computer or even here by clicking fork below any solution?

Make a simple function called greet that returns the most-famous "hello world!".

Your code is wrong, it doesn't return "hello world!". It just returns the string passed to it. Not a kata issue. Please read this: https://docs.codewars.com/training/troubleshooting/