The **diagonal difference problem** is a common exercise in coding, often used in practice for learning array manipulation and basic math operations. The challenge involves a square matrix of numbers and requires calculating the absolute difference between the sums of its diagonals.

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## Here is the Diagonal difference hackerrank problem and solution using HackerRankGPT:

## Diagonal difference hackerrank solution:

```
def diagonalDifference(arr):
n = len(arr) # Get the size of the matrix
main_diagonal_sum = 0
secondary_diagonal_sum = 0
for i in range(n):
main_diagonal_sum += arr[i][i]
secondary_diagonal_sum += arr[i][n-1-i]
# Calculate the absolute difference between the two sums
return abs(main_diagonal_sum - secondary_diagonal_sum)
```

To solve the "Diagonal Difference" problem using Python, you can follow this approach:

- Define a function
**diagonalDifference**that takes a square matrix**arr**as input. - Initialize two variables to store the sums of the main diagonal and the secondary diagonal.
- Loop through the matrix, and for each index
**i**, add**arr[i][i]**to the main diagonal sum and**arr[i][n-1-i]**to the secondary diagonal sum (where**n**is the size of the matrix). - Calculate the absolute difference between the two sums and return it.

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