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Reverse Slicing

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#1

There is an example of reverse slicing that I saw in the course:

092222b90a64fd3aa475
092222b90a64fd3aa4751162×532 65.3 KB

At line 3 it said

print(my_string[17:0:-2])

I thought the outcome would be

git Ms it

because:

  • the substring has 18 characters
  • so when we type “[17:0:-2]” it means the substring ends before “!”

but the result was actually

!nrsY ish

can sb explain why? sorry for my bad english

#2

Yes, the length of the string is 18 but that means the index range is 0-17. You can execute the statement print(my_string[17]) and it will print !.

#3

Could you please explain the calculation of Line 2