c++ factorial
#include <cmath>
int fact(int n){
return std::tgamma(n + 1);
}
// for n = 5 -> 5 * 4 * 3 * 2 = 120
//tgamma performas factorial with n - 1 -> hence we use n + 1c++ factorial
#include <cmath>
int fact(int n){
return std::tgamma(n + 1);
}
// for n = 5 -> 5 * 4 * 3 * 2 = 120
//tgamma performas factorial with n - 1 -> hence we use n + 1Write a C++ program to calculate factorial of a number.
#include <iostream>
using namespace std;
int main() {
// #ifndef ONLINE_JUDGE // not part of code, used to beautify input output
// freopen("input.txt", "r", stdin);
// freopen("output.txt", "w", stdout);
// #endif
int n, i, fact;
cin >> n;
fact = n;
for (i = 1; i < n; i++) {
fact = fact * (n - i);
}
cout << fact;
return 0;
}Copyright © 2021 Codeinu
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