Oops, try again. join_strings(['x', 'y', 'z', 'a']) returned None, did you remember to return the result?
This is the latest error message that i keep getting, but i really cannot understand why. I've been back and forward with this and i'm returning the result ( i guess ). So where's the error? Can someone help me clarifying it to me?
Thanks a lot in advance,
n = ["Michael", "Lieberman"] # Add your function here def join_strings(words): result = "" for word in range(len(words)): result = words.append(word) return result print join_strings(n)