Multi dimensional array is difficult to learn.

Question

can anyone explain me..

Answer 1

It simply means the depth of arrays within arrays. Eg: 4D,3D,2D,etc.

[1,2,3]
[1,2,[3]]
[1,2,3,[4,[5,6]]]
.
.
.

and it goes on and on

Answer 2

if you think of it as rows and coloumns, you'll surely face problem after 2D. think of it as it's given by chirag bhansali.
ps- classes, including inheritance and polymorphism, is harder still(LOL!)