I don't understand why this keeps saying "0"

Question

https://code.sololearn.com/cukytW1maE3B/?ref=app

Answer 1

Because you only initialize it with a 2d array (an array of arrays), not a 3d array.

So everything you haven't filled yet, remains zero.

Answer 2

~ swim ~ , thanks. But do you have to always represent the array indexes with alphabets?

Answer 3

Ok. Thanks.

Answer 4

~ swim ~ how do you mean? With "For" statements?