# Modulus of all pairwise consecutive elements in an Array

Given an array of elements. The task is to print the modulus of all of the pairwise consecutive elements. That is for all pair of consecutive elements say ((a[i], a[i+1])), print (a[i] % a[i+1]).

Note: 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 3 15

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

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach: The solution is to traverse the array and calculate and print the modulus of every pair (arr[i], arr[i+1]).

Below is the implementation of the above approach:

## C++

 `// C++ program to print the modulus ` `// of the consecutive elements ` `#include ` `using` `namespace` `std; ` ` `  `// Function to print pairwise modulus ` `// of consecutive elements ` `void` `pairwiseModulus(``int` `arr[], ``int` `n) ` `{ ` `    ``for` `(``int` `i = 0; i < n - 1; i++) { ` ` `  `        ``// Modulus of consecutive numbers ` `        ``cout << (arr[i] % arr[i + 1]) << ``" "``; ` `    ``} ` `} ` ` `  `// Driver Code ` `int` `main() ` `{ ` `    ``int` `arr[] = { 8, 5, 4, 3, 15, 20 }; ` `    ``int` `n = ``sizeof``(arr) / ``sizeof``(arr); ` ` `  `    ``pairwiseModulus(arr, n); ` ` `  `    ``return` `0; ` `} `

## Java

 `// Java program to print the modulus ` `// of the consecutive elements ` `import` `java.util.*; ` ` `  `class` `Geeks { ` `     `  `// Function to print pairwise modulus ` `// of consecutive elements ` `static` `void` `pairwiseModulus(``int` `arr[], ``int` `n) ` `{ ` `    ``for` `(``int` `i = ``0``; i < n - ``1``; i++) { ` ` `  `        ``// Modulus of consecutive numbers ` `        ``System.out.println((arr[i] % arr[i + ``1``])); ` `    ``} ` `} ` ` `  `// Driver Code ` `public` `static` `void` `main(String args[]) ` `{ ` `    ``int` `arr[] = { ``8``, ``5``, ``4``, ``3``, ``15``, ``20` `}; ` `    ``int` `n = arr.length; ` ` `  `    ``pairwiseModulus(arr, n); ` `} ` `} ` ` `  `// This code is contributed by ankita_saini `

## Python3

 `# Python 3 program to print the modulus ` `# of the consecutive elements ` ` `  `# Function to print pairwise modulus ` `# of consecutive elements ` `def` `pairwiseModulus(arr, n): ` `    ``for` `i ``in` `range``(``0``, n ``-` `1``, ``1``): ` `         `  `        ``# Modulus of consecutive numbers ` `        ``print``((arr[i] ``%` `arr[i ``+` `1``]),  ` `                         ``end ``=` `" "``) ` `     `  `# Driver Code ` `if` `__name__ ``=``=` `'__main__'``: ` `    ``arr ``=` `[``8``, ``5``, ``4``, ``3``, ``15``, ``20``]  ` `    ``n ``=` `len``(arr) ` `    ``pairwiseModulus(arr, n) ` ` `  `# This code is contributed  ` `# by Surendra_Gangwar `

## C#

 `// C# program to print the modulus ` `// of the consecutive elements ` `using` `System; ` ` `  `class` `Geeks { ` `     `  `// Function to print pairwise modulus ` `// of consecutive elements ` `static` `void` `pairwiseModulus(``int``[] arr, ``int` `n) ` `{ ` `    ``for` `(``int` `i = 0; i < n - 1; i++) { ` ` `  `        ``// Modulus of consecutive numbers ` `        ``Console.WriteLine((arr[i] % arr[i + 1])); ` `    ``} ` `} ` ` `  `// Driver Code ` `public` `static` `void` `Main(String []args) ` `{ ` `    ``int``[] arr = {8, 5, 4, 3, 15, 20}; ` `    ``int` `n = arr.Length; ` ` `  `    ``pairwiseModulus(arr, n); ` `} ` `} ` ` `  `// This code is contributed by ankita_saini `

## PHP

 ` `

Output:

```3 1 1 3 15
```

Time complexity : O(n)

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