Hackerrank – Diagonal Difference – PHP

Given a square matrix, calculate the absolute difference between the sums of its diagonals.

For example, the square matrix arr
is shown below:
1 2 3
4 5 6
9 8 9

The left-to-right diagonal = 1+5+9 =15 . The right to left diagonal = 3+5+9=17
Their absolute difference is
|15-17| =2
Function description

Complete the

function in the editor below.

diagonalDifference takes the following parameter:

int arr[n][m]: an array of integers

Return

int: the absolute diagonal difference

Leave a comment