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1D 2D array variables

James Matthews

Joined: Aug 06, 2003
Posts: 4
also coming stuck with these. ive ordered your book and shouldnt have any further problems once that's arrived (he wishes!)
what are 1d and 2d array variables?
Ernest Friedman-Hill
author and iconoclast

Joined: Jul 08, 2003
Posts: 24199

A one dimensional (1d) array is like a list of items:

A two dimensional (2d) array is like a rectangular matrix of items:

You get can an element of a 1d array with one subscript: list[2] is the int "12" (we count from 0 in Java). But you need two subscripts to get an element of a 2d array: matrix[2][1] is the int "9". 2 is the row number, and 1 is the column number. Make sense?

[Jess in Action][AskingGoodQuestions]
James Matthews

Joined: Aug 06, 2003
Posts: 4
yes both my queries are cleared up, thanks a lot.
hopefully ill start to understand it all better soon
I agree. Here's the link:
subject: 1D 2D array variables
jQuery in Action, 3rd edition