Can any help me? (Small doubt )

Question

#why the answer is9
a=[4,3,9,5]
b=a[-2]
print(b)

Answer 1

indexing from last element goes like this
-1,-2,-3,-4

Answer 2

Bruklin a[-2] means the second element list a from end of this array. a[-1]=5, a[-2]=9, a[-3]=3, a[-4]=4. So b=a[-2] means b=9...

Answer 3

thank u everyone