Geeksforgeeks Solution For " Multiply Array "

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Problem :- 

Calculate the product of all the elements in an array.

Input:
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case consist of two lines . The first line of each test case contains an integer N.The second line of each test case contains N space separated integers denoting elements of the array A[ ].

Output:

For each test case in a new line print the product of all elements.

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Solution :-

#include <bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        long long int n,i,j,res=1;
        cin>>n;
        int arr[n];

        for(i=0;i<n;i++)
        cin>>arr[i];
        
        for(i=0;i<n;i++)
        res*=arr[i];
        
        cout<<res<<endl;
        
    }
    return 0;

}

Output :-