Geeksforgeeks Solution For " nPr "

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Problem :- Write a program to calculate nPr. nPr represents n permutation r and value of nPr is (n!) / (n-r)!.

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Solution :-

#include <iostream>
using namespace std;
long long int fact(int x);   
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
    int n,r,npr;
    long long int p=1;
cin>>n>>r;
npr=n-r+1;    
    for(int i=npr;i<=n;i++)
    {
        p=p*i;
    }
    cout<<p<<endl;
    }
return 0;
}

Output:-