# Min Value of a 2D Array diagonally? [Java] Code Answer

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I’m currently stuck on finding a min value of 2D array diagonal? For example if i had

```2 1 3
4 5 6
9 8 7
```

I’d want the diagonal min of 2, 5 ,7. As of now I have a nested for loop that prints 0, honestly my code below is pretty useless but might as well post it.

```double minD = 0;
for (int row = 0; row < a.length; row++) {
for (int col = 0; col < a[row].length; col++) {
minD = Math.min(minD, a[row][col]);
System.out.printf("%5.2f", minD);
```

If anyone can help me out it’d be much appreciated!

1. `minD` initialized with `0` is the problem. Since `0` is lesser than any of your values, the correct output does not come through.

2. Your code checks for all matrix values, not just the diagonals.

```int arr[][] = {{2, 1, 3}, {4,5,6}, {9,8,7} };
int min = arr;
for(int i=0; i<arr.length; i++) {
if(arr[i][i]<min)
min = arr[i][i];
}
System.out.println(min);
```

This code checks just for diagonal elements.