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1D 2D array variables

 
James Matthews
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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
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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?
 
James Matthews
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yes both my queries are cleared up, thanks a lot.
hopefully ill start to understand it all better soon
 
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