How reverse works in python

Question

I have an array which contains some elements.

How by doing arr[::-1] sort the entire array?

What is the logic behind that?

Sorting the array would change the order of all its elements such that arr[i] <= arr[i+1]. arr[::-1] doesn't do that, it just reverses the order in which they occur in the array. — martineau
– martineau, Commented Aug 16, 2016 at 13:09

Community · Accepted Answer · 2017-05-23 11:53:31Z

5

This is extended slice syntax. It works by doing [begin:end:step] - by leaving begin and end off and specifying a step of -1, it reverses a string. Example:

>>> 'hello world'[::-1]
'dlrow olleh'

See also

edited May 23, 2017 at 11:53

CommunityBot

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answered Aug 16, 2016 at 12:04

Shaig Khaligli

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