Reverse a string

Reverse a string.

Sample String :

“1234abcd”

Expected output:

dcba4321

def string_reverse(S):

    RS = ''
    index = len(S)

    while index > 0:
        RS += S[index - 1]
        index -= 1
    return RS

# test
print(string_reverse('1234abcd'))

Output:

dcba4321

See also

https://www.w3resource.com/python-exercises/python-functions-exercise-4.php