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In this post, you will find the solution for **Diagonal Difference** **in Java-HackerRank Problem**. We are providing the **correct and tested solutions** of coding problems present on **HackerRank**. If you are not able to solve any problem, then you can take help from our Blog/website.

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**Introduction To Algorithm**

The word **Algorithm** means “a process or set of rules to be followed in calculations or other problem-solving operations”. Therefore Algorithm refers to a set of rules/instructions that step-by-step define how a work is to be executed upon in order to get the expected results.

**Advantages of Algorithms:**

- It is easy to understand.
- Algorithm is a step-wise representation of a solution to a given problem.
- In Algorithm the problem is broken down into smaller pieces or steps hence, it is easier for the programmer to convert it into an actual program.

** Link for the Problem** – Diagonal Difference– Hacker Rank Solution

Diagonal Difference – Hacker Rank Solution

**Problem:**

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

For example, the square matrix is shown below:

1 2 3 4 5 6 9 8 9

**Return**

*int*: the absolute diagonal difference

**Input Format**

**Output Format**

Return the absolute difference between the sums of the matrix’s two diagonals as a single integer.

**Sample Input**

3 11 2 4 4 5 6 10 8 -12

**Sample Output**

15

**Explanation**

The primary diagonal is:

11 5 -12

Sum across the primary diagonal: 11 + 5 – 12 = 4

The secondary diagonal is:

4 5 10

Sum across the secondary diagonal: 4 + 5 + 10 = 19

Difference: |4 – 19| = 15

**Note:** |x| is the absolute value of x

Diagonal Difference – Hacker Rank Solution

public class DiagonalDifference { static int diagonalDifference(int[][] arr) { int leftSum = 0, rightSum = 0; int n = arr.length; for (int i = 0; i < n; i++) { leftSum += arr[i][i]; rightSum += arr[i][n - 1 - i]; } return (Math.abs(leftSum - rightSum)); } }