How does Python execute string slicing?

Question

Is there any kind of algorithm that you can apply to understand how Python will slice and output a sting?

I have

a="what's up"

And let's say I slice it like this:

print(a[-2:-9:-1])

So it gives me "u s'tah"

But what exactly does Python do first and last when slicing a string? Like, does it reverse a string first and then slice it, etc.?

All your questions (including the one you deleted just now) seem to be variations of the same theme. Perhaps retreat to reading existing materials until you have a specific, concrete question about this. — tripleee
– tripleee, Commented Apr 23, 2022 at 16:15
@tripleee Yes, they are. I'm just bad at putting all my requests into one precise, well-organized question. This one is the closest to what I try to understand. But it seems I just don't understand the topic completely, or I'm extremely confused. — user18910539
– user18910539, Commented Apr 23, 2022 at 17:49

tripleee · Accepted Answer · 2022-04-23 18:01:31Z

1

a="what's up"
print(a[-2:-9:-1]) - a[(start, end , step)]

So, the output would be "u s'tah"

  print(a[-2:-9:-1]) # u s'tah
    print(a[-2:-9:-2]) # usth
    print(a[-2:-9:-3]) # u'h

tripleee

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answered Apr 23, 2022 at 10:56

Eddie Wong

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