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# About arrays

Can someone please tell me how is arr[ ] [ ] value is calculated

1 Answer

+ 3

Let us assume that we have a matrix.
arr [i][j];
Now considering i = j = 3
arr [3][3]; // 3×3 matrix
Row 0-> 1 2 3
Row 1-> 4 5 6
Row 2-> 7 8 9
Similarly mark the columns from 0 to 2.
Though you have the size as 3 by 3 but the indexing starts from 0 to 2 in this case.
Element at row 0 & column 0 is 1
OR arr[0][0] = 1
Element at row 0 & column 1 is 2
OR arr[0][1] = 2
Element at row 0 & column 2 is 3
OR arr[0][2] = 3
And so on....