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Absolute Difference of all pairwise consecutive elements in an array

  • Difficulty Level : Basic
  • Last Updated : 30 Apr, 2021
Geek Week

Given an array of integers of N elements. The task is to print the absolute difference of all of the pairwise consecutive elements.
Pairwise consecutive pairs of an array of size N are (a[i], a[i+1]) for all i ranging from 0 to N-2
Examples: 
 

Input: arr[] = {8, 5, 4, 3, 15, 20}
Output: 3, 1, 1, 12, 5

Input: arr[] = {5, 10, 15, 20}
Output: 5, 5, 5

 

Approach: The solution is to traverse the array and calculate and print the absolute difference of every pair (arr[i], arr[i+1]).
Below is the implementation of the above approach: 
 

C++




// C++ program to print the absolute
// difference of the consecutive elements
#include <iostream>
using namespace std;
 
// Function to print pairwise absolute
// difference of consecutive elements
void pairwiseDifference(int arr[], int n)
{
    int diff;
    for (int i = 0; i < n - 1; i++) {
 
        // absolute difference between
        // consecutive numbers
        diff = abs(arr[i] - arr[i + 1]);
        cout << diff << " ";
    }
}
 
// Driver Code
int main()
{
    int arr[] = { 4, 10, 15, 5, 6 };
    int n = sizeof(arr) / sizeof(arr[0]);
 
    pairwiseDifference(arr, n);
 
    return 0;
}

Java




// Java program to print the absolute
// difference of the consecutive elements
 
class GFG{
// Function to print pairwise absolute
// difference of consecutive elements
static void pairwiseDifference(int arr[], int n)
{
    int diff;
    for (int i = 0; i < n - 1; i++) {
 
        // absolute difference between
        // consecutive numbers
        diff = Math.abs(arr[i] - arr[i + 1]);
        System.out.print(diff+" ");
    }
}
 
// Driver Code
public static void main(String[] args)
{
    int arr[] = { 4, 10, 15, 5, 6 };
    int n = arr.length;
 
    pairwiseDifference(arr, n);
}
}
// This code is contributed by mits

Python 3




# Python 3 program to print the absolute
# difference of the consecutive elements
 
# Function to print pairwise absolute
# difference of consecutive elements
def pairwiseDifference(arr, n):
     
    for i in range(n - 1) :
 
        # absolute difference between
        # consecutive numbers
        diff = abs(arr[i] - arr[i + 1])
        print(diff , end = " ")
 
# Driver Code
if __name__=="__main__":
    arr = [ 4, 10, 15, 5, 6 ]
    n = len(arr)
 
    pairwiseDifference(arr, n)
 
# This code is contributed
# by ChitraNayal

C#




// C# program to print the absolute
// difference of the consecutive elements
using System;
 
class GFG{
// Function to print pairwise absolute
// difference of consecutive elements
static void pairwiseDifference(int []arr, int n)
{
    int diff;
    for (int i = 0; i < n - 1; i++) {
 
        // absolute difference between
        // consecutive numbers
        diff = Math.Abs(arr[i] - arr[i + 1]);
        Console.WriteLine(diff+" ");
    }
}
 
// Driver Code
public static void Main(String[] args)
{
    int []arr = { 4, 10, 15, 5, 6 };
    int n = arr.Length;
 
    pairwiseDifference(arr, n);
}
}

PHP




<?php
// PHP program to print the absolute
// difference of the consecutive elements
 
// Function to print pairwise absolute
// difference of consecutive elements
function pairwiseDifference($arr, $n)
{
    $diff = 0;
    for ($i = 0; $i < $n - 1; $i++)
    {
 
        // absolute difference between
        // consecutive numbers
        $diff = abs($arr[$i] - $arr[$i + 1]);
        echo $diff." ";
    }
}
 
// Driver Code
$arr = array( 4, 10, 15, 5, 6 );
$n = sizeof($arr);
 
pairwiseDifference($arr, $n);
 
// This code is contributed by mits
?>

Javascript




<script>
// javascript program to prvar the absolute
// difference of the consecutive elements    
// Function to prvar pairwise absolute
    // difference of consecutive elements
    function pairwiseDifference(arr , n) {
        var diff;
        for (i = 0; i < n - 1; i++) {
 
            // absolute difference between
            // consecutive numbers
            diff = Math.abs(arr[i] - arr[i + 1]);
            document.write(diff + " ");
        }
    }
 
    // Driver Code
     
        var arr = [ 4, 10, 15, 5, 6 ];
        var n = arr.length;
 
        pairwiseDifference(arr, n);
 
// This code contributed by umadevi9616
</script>
Output: 
6 5 10 1

 

Time complexity : O(n)
 

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