Python: My function returns “None” after it does what I want it to [duplicate]

Answer 1

As mentioned earlier. If the python function does not come across a return statement it prints None by default. Making a small change as shown below fixes this:

def reverse(letters):
    backwards = ""
    i = len(letters) - 1
    while i >= 0:
        backwards = backwards + letters[i]
    i = i - 1
    return(backwards)  # instead of print(backwards)

print(reverse("hello"))