Why is this the output?

Question

This is the code:

help= “SOS”
a= help [1]
b= help [-1]
print(a,b)

The answer is: O S but why?

Answer 1

S O S
0 1 2 positive index

-3 -2 -1 negative index

https://www.quora.com/What-is-negative-index-in-JUMP_LINK__&&__Python__&&__JUMP_LINK

Answer 2

thank you!