JAVA: Diagonal value multiplication

Question

https://code.sololearn.com/ct5QVOzOTG1D
This code takes the size of the 2D matrix n and a 2D array of values n*n. It is supposed to print the results of multiplying the numbers on each diagonal together. But my code displays a single value repeated 3 times instead, and I can't find my mistake.

Sample input:
3 1 2 3 4 5 6 7 8 9

Sample output:
3 25 63

Explanation:
1 2 3
4 5 6
7 8 9

1*3 =3
5*5 =25
7*9 =63

My output:
63 63 63

Any help is appreciated!

Answer 1

Salma D. Elabsi

Minor changes:

https://code.sololearn.com/c246GCmUy74V/?ref=app

Answer 2

Here I have a preloaded matrix just for an example, and the main logic is in the for...loop. You are welcome to confirm in case of any doubt, but I guess you'll get it no sweat ...

public class DiagonalSum
{
public static void main(String[] args)
{
int[][] arr =
{
{ 1, 2, 3 },
{ 4, 5, 6 },
{ 7, 8, 9 }

};
int size = 3; // matrix size
for( int left = 0, right = size - 1; left < size; left++, right-- )
{
System.out.printf( "%d x %d = ", arr[ left ][ left ], arr[ left ][ right ] );
System.out.println( arr[ left ][ left ] * arr[ left ][ right ] );
}
}
}

Answer 3

Thank you so much Ipang and AJ! I appreciate it a lot