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nbr stands for number. It is used to generate numbers for the array from 0 to n*n-1

For testing it will be easier to talk about the elements in the array if they were all unique. The code I posted in post#4 will generate all unique numbers.

To see what the code is doing add a...

Can you explain what is wrong with the output?

A suggestion for testing. Make the changes you see here on the three lines with comments:

int n = 4; // input.nextInt();
int...

Please post the program's output and add some comments saying what is wrong and show what the output should be.