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When you say "iterate" you mean refer to the elements in a loop?  If so, its just rows and columns.  Use _arrayDisplay to visualize the data before you loop.  Here is an example: 

#include <Array.au3>

global $reproArray[5][2]=[["Bob",34],["James",22],["Sally",18],["David",43],["Cindy",28]]

;visualize data

; walk 2d array
for $a=0 to ubound($reproArray)-1
    ConsoleWrite("Name: " & $reproArray[$a][0]&" age: "&$reproArray[$a][1] & @crlf)


Edited by Jfish

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@Jfish: I don't think that example is very helpful:o; not only is the column dimension wrong, the script is still treating the array as if it were 1D, because it does not loop through the columns.

Instead, I would suggest using nested for-next loops (one per dimension), like so:

Global $reproArray[6][2]=[["NAME","AGE"],["Bob",34],["James",22],["Sally",18],["David",43],["Cindy",28]]

; walk 2d array
For $rowindex=0 to Ubound($reproArray,1)-1
    For $colindex=0 to Ubound($reproArray,2)-1
        ConsoleWrite($reproArray[$rowindex][$colindex] &  @TAB)

This can easily be scaled up to handle any number of array dimensions.

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