# FAQ: 2D Arrays: Java - Review of Nested Loops

This community-built FAQ covers the “Review of Nested Loops” exercise from the lesson “2D Arrays: Java”.

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This exercise can be found in the following Codecademy content:

## FAQs on the exercise Review of Nested Loops

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On the above code, I tried removing innerCounter = o; inside the while loop code.
Why outerCounter++ could change the variable value of int outerCounter = 0 outside while loop,
while innerCounter++ cannot change int innerCounter = 0?

Thank you.

From what I understand, innerCounter needs to be set to 0 everytime the program iterates through a new subarray because if it wasn’t, the program would only read the last element of all subarrays after that. Something similar doesn’t need to happen for outerCounter because its index must keep increasing to access each new subarray.

Here’s a diagram I drew that maps it out:

I hope I was able to clarify what you wanted to know!

2 Likes

Oh, now I see! Thank you very much!

1 Like