[問題]reverse string

[ilvicco (家齊說我是螞蟻)]

Please write a function to inverse a string. This function accept a string
argument and return the reversed string. For example,
reverse (‘apple’)  returned  ‘elppa’
reverse(‘madam’) returned ‘madam’.

Hine：
(1) set local variable y = ‘’。
(2) from right to left, read a char from input string and append to the end
of y.
(3) return y as result


reverse 要怎麼寫?
我只是個新手希望大家幫幫我~~謝謝:)

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推 timerover:s = 'abc'
→ timerover:s = s[::-1]