# Program for multiplication of array elements

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.

`// Iterative C++ program to multiply array elements`
`#include<iostream>`
`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 function`
`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;`
`}`

Output:

`720`

Recursive Method :

`// 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 function`
`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;`
`}`
``` 720

```

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source and credits.
source and credits: http://www.geeksforgeeks.org
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rakesh