Built in factorial function in c++

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 vote186 views1 answer
Check whether the jth object is in the subset
C++
0 vote201 views1 answer
Madiar loh
C++
0 vote215 views1 answer
Dynamic memory allocation for string in c++
C++
1 vote201 views1 answer
C++ ::
C++
1 vote200 views1 answer
Select one random element of a vector in c++
C++
0 vote180 views2 answers
Accepting multiple values from a function in cpp
C++
0 vote196 views6 answers
Gcd
C++
0 vote192 views1 answer
C++ to assembly
C++
10 votes203 views5 answers
Print vector
C++
0 vote203 views1 answer
Std vector c++
C++