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 + 1

Built in factorial function in c++

int factorial(int n)
{
  return (n == 1 || n == 0) ? 1 : factorial(n - 1) * n;
}

Source: cplusplus.com

Similar codes

0 vote356 views1 answer
Pca compact trick
C++
0 vote321 views1 answer
Powershell script query mssql windows authentication
C++
0 vote319 views1 answer
Convert fahrenheit to celsius
C++
27 votes319 views2 answers
How to remove an element from a vector by value c++
C++
102 votes492 views6 answers
Git config username and password
C++
0 vote321 views1 answer
C++ looping through a vector
C++
0 vote310 views1 answer
Tutti i tipi di equazioni trigonometriche
C++
42 votes371 views10 answers
Twitter
C++
10 votes314 views3 answers
C++ int to char*
C++
-1 vote319 views10 answers
Time complexity calculator online
C++