Count Number of Pairs With Absolute Difference K

Given an integer array nums and an integer k, return the number of pairs (i, j) where i < j such that |nums[i] - nums[j]| == k.

The value of |x| is defined as:

• x if x >= 0.

• -x if x < 0.

LeetCode Problem - 2006

class Solution {
    // Function to count pairs in the array with a difference of k
    public int countKDifference(int[] nums, int k) {
        int count = 0; // Initialize count of pairs
        for(int i=0; i<nums.length; i++){ // Loop through the array
            for(int j=i+1; j<nums.length; j++){ // Iterate over elements ahead of the current element
                int flag = Math.abs(nums[i] - nums[j]); // Calculate the absolute difference between the elements
                if(flag == k) count++; // If the absolute difference equals k, increment count
            }
        }
        return count; // Return the count of pairs with a difference of k
    }
}