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 vote158 views1 answer
Inline in class in C++
C++
0 vote158 views2 answers
GCD(x, yz)
C++
3 votes145 views2 answers
Define and show the implementation of the functions of an arrayList.
C++
0 vote175 views1 answer
Call of overloaded ‘swap(int&, int&)’ is ambiguous
C++
2 votes199 views1 answer
Ph vid
C++
1 vote176 views3 answers
Arduino get size of array
C++
0 vote150 views1 answer
C++ terinary operator
C++
-1 vote110 views1 answer
Dynamic 2d array c++
C++
0 vote153 views1 answer
How to check char array equality in c++
C++
1 vote171 views1 answer
Shout sharkest
C++