We are given an array and we have to calculate the product of an array using both iterative and recursive method.
Examples :
Input : array[] = {1, 2, 3, 4, 5, 6} Output : 720 Here, product of elements = 1*2*3*4*5*6 = 720 Input : array[] = {1, 3, 5, 7, 9} Output : 945
Iterative Method :
We initialize result as 1. We traverse array from left to right and multiply elements with result.
C++
// Iterative C++ program to // multiply array elements #include<bits/stdc++.h> using namespace std; // Function to calculate the // product of the array int multiply( int array[], int n) { int pro = 1; for ( int i = 0; i < n; i++) pro = pro * array[i]; return pro; } // Driver Code int main() { int array[] = {1, 2, 3, 4, 5, 6}; int n = sizeof (array) / sizeof (array[0]); // Function call to calculate product cout << multiply(array, n); return 0; } |
Java
// Iterative Java program to // multiply array elements class GFG { static int arr[] = { 1 , 2 , 3 , 4 , 5 , 6 }; // Method to calculate the // product of the array static int multiply() { int pro = 1 ; for ( int i = 0 ; i < arr.length; i++) pro = pro * arr[i]; return pro; } // Driver Code public static void main(String[] args) { // Method call to calculate product System.out.println(multiply()); } } |
Python3
# Iterative Python3 code to # multiply list elements # Function to calculate # the product of the array def multiply( array , n ): pro = 1 for i in range (n): pro = pro * array[i] return pro # Driver code array = [ 1 , 2 , 3 , 4 , 5 , 6 ] n = len (array) # Function call to # calculate product print (multiply(array, n)) # This code is contributed # by "Sharad_Bhardwaj". |
C#
// Iterative C# program to // multiply array elements using System; class GFG { static int []arr = {1, 2, 3, 4, 5, 6}; // Method to calculate the // product of the array static int multiply() { int pro = 1; for ( int i = 0; i < arr.Length; i++) pro = pro * arr[i]; return pro; } // Driver Code public static void Main() { // Method call to calculate product Console.Write(multiply()); } } // This code is contributed by nitin mittal |
PHP
<?php // Iterative PHP program to // multiply array elements // Function to calculate the // product of the array function multiply( $arr , $n ) { $pro = 1; for ( $i = 0; $i < $n ; $i ++) $pro = $pro * $arr [ $i ]; return $pro ; } // Driver Code $arr = array (1, 2, 3, 4, 5, 6); $n = sizeof( $arr ) / sizeof( $arr [0]); // Function call to // calculate product echo multiply( $arr , $n ); return 0; // This code is contributed by nitin mittal. ?> |
Output :
720
Recursive Method :
C++
// Recursive C++ program to // multiply array elements #include<iostream> using namespace std; // Function to calculate the // product of array using recursion int multiply( int a[], int n) { // Termination condition if (n == 0) return (a[n]); else return (a[n] * multiply(a, n - 1)); } // Driver Code int main() { int array[] = {1, 2, 3, 4, 5, 6}; int n = sizeof (array) / sizeof (array[0]); // Function call to // calculate the product cout << multiply(array, n - 1) << endl; return 0; } |
Java
// Recursive Java program to // multiply array elements class GFG { static int arr[] = { 1 , 2 , 3 , 4 , 5 , 6 }; // Method to calculate the product // of the array using recursion static int multiply( int a[], int n) { // Termination condition if (n == 0 ) return (a[n]); else return (a[n] * multiply(a, n - 1 )); } // Driver Code public static void main(String[] args) { // Method call to // calculate product System.out.println(multiply(arr, arr.length - 1 )); } } |
Python3
# Recursive Python3 code # to multiply array elements # Function to calculate the product # of array using recursion def multiply( a , n ): # Termination condition if n = = 0 : return (a[n]) else : return (a[n] * multiply(a, n - 1 )) # Driver Code array = [ 1 , 2 , 3 , 4 , 5 , 6 ] n = len (array) # Function call to # calculate the product print (multiply(array, n - 1 )) # This code is contributed # by "Sharad_Bhardwaj". |
C#
// Recursive C# program to // multiply array elements using System; class GFG { static int []arr = {1, 2, 3, 4, 5, 6}; // Method to calculate the product // of the array using recursion static int multiply( int []a, int n) { // Termination condition if (n == 0) return (a[n]); else return (a[n] * multiply(a, n - 1)); } // Driver Code public static void Main() { // Method call to // calculate product Console.Write(multiply(arr, arr.Length - 1)); } } // This code is contributed by Nitin Mittal. |
PHP
<?php // Recursive PHP program to // multiply array elements // Function to calculate the // product of array using recursion function multiply( $a , $n ) { // Termination condition if ( $n == 0) return ( $a [ $n ]); else return ( $a [ $n ] * multiply( $a , $n - 1)); } // Driver Code $array = array (1, 2, 3, 4, 5, 6); $n = count ( $array ); // Function call to // calculate the product echo multiply( $array , $n - 1) // This code is contributed by anuj_67. ?> |
Output :
720
This article is contributed by Rishabh Jain. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.