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Copy pathDiagonal2DArray.java
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47 lines (37 loc) · 1.17 KB
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public class Diagonal2DArray {
public static void main(String[] args) {
System.out.println("Welcome to Sum of Diagonal in 2D Array:\n");
int[][] numArr = ArrayUtility.input2DArray();
long sumOfDiagonal = sumOfDiagonal(numArr);
System.out.println("Sum of Diagonal is : "+sumOfDiagonal);
}
public static long sumOfDiagonal(int[][] numArr ){
long leftSum = sumOfLeftDiagnoal(numArr);
long rightSum = sumOfRightDiagnoal(numArr);
long sum = leftSum + rightSum ;
if(numArr.length % 2 != 0){
int ind = numArr.length / 2;
sum -= numArr[ind][ind];
}
return sum;
}
public static long sumOfLeftDiagnoal(int[][] numArr ){
long sum = 0 ;
int i = 0;
while(i < numArr.length){
sum = sum + numArr[i][i];
i++;
}
return sum;
}
public static long sumOfRightDiagnoal(int[][] numArr ){
long sum = 0 ;
int i = 0;
while(i < numArr.length){
int col = numArr.length - 1 - i ;
sum = sum + numArr[i][col];
i++;
}
return sum;
}
}