Mathematica list output [closed]

Question

Mathematica is giving me a weird output when I am asking for a specific element of a nested list.

I have:

testroots = {{0, 0, 0}, {0, 0, 0}}

When I ask for

testroots[[0,0]]

which should give me a 0, instead Mathematica says

Symbol

I don't understand why this is or what I've done wrong.

Thanks!

Answer 1

Mathematica indices start with 1, not zero. So the [[0,0]] entry of testroots doesn't exist. You can get the first element using

testroots[[1, 1]]