m = [ [1,2,3], [4,5,6] ] print(m[1][2])

Question

In the code why output is 6?

Answer 1

I would recommend you review indexing/slicing. This is a list of lists and since indexing starts at 0... m[1] is [4,5,6] and m[1][2] is the 3rd element, which is 6

https://www.sololearn.com/learn/JUMP_LINK__&&__Python__&&__JUMP_LINK/2431/?ref=app

https://realpython.com/lessons/indexing-and-slicing/

Answer 2

m has two arrays...
Array one [1, 2, 3] which is 0
Array two [4, 5, 6] which is 1

So m[1] which is [4, 5, 6] of [2]
Which is 6