s="Welcome"

Question

s="Welcome"
print(s[2::-4])
Output: l

It's an index, print from the second in the index (l) to the end (e) and count by -4? Am I misreading this?

Also, does -1 start from "e" the last character in the string or "m" the second to last character in the string (I think I've seen both ways before). Thanks for any help.

Answer 1

You're reading it correctly, but the output is the letter l, not 1 (one).
If the first number is -1 it starts from the last character ("e" in this case). If the second number is -1 it ends at the second to last character ("m" in this case).

Answer 2

-2 -1 1 2 3 4
w e l c o m e

"-4" - это slice step который отсчитываеться от "l" в левую сторону. Так как "-4" выходит за пределы индекса относительно "l", то и выводит только s[2] - "l".

"-4" is a slice step that counts from "l" to the left. Since "-4" is outside the index with respect to "l", it only outputs s [2] - "l".

Answer 3

Thanks Diego! BTW, I edited my post (changed "1" to "l":)).