Why does test(2)=1 create a 1x2 array rather than a 2x1 array?

Why does

test(2)=1

create a 1x2 array rather than a 2x1 array, when test has not been defined before? Is there any reasoning behind it?

Answer 1

[Walter Roberson]

History.

So that when people do quick calculations, the results will show up across the page rather than using up a lot of vertical lines each with small amounts of output.