How do I find the sum of diagonal elements in 2d ArrayList?… here is a solution to the problem.
How do I find the sum of diagonal elements in 2d ArrayList?
I need to find the sum of diagonals in 2D
ArrayList
List<List<Integer>> arr
Solution
public static int diagonalDifference(List<List<Integer>> arr) {
int size = arr.size();
int add1=0;
int add2=0;
for(int i=0 ; i < size ; i++){
add1 = add1+ arr.get(i).get(i);
add2 = add2+ arr.get(i).get(size -i-1);
}
int absoluteValue =Math.abs( add1 - add2);
return absoluteValue;
}