Reverse a string without using reversed() or [::-1]?

Question

I came across a strange Codecademy exercise that required a function that would take a string as input and return it in reverse order. The only problem was you could not use

Answer 1

This is my solution using the for i in range loop:

def reverse(string):
    tmp = ""
    for i in range(1,len(string)+1):
        tmp += string[len(string)-i]            
    return tmp

It's pretty easy to understand. I start from 1 to avoid index out of bound.