Question

write a program to find the factorial of a number

Answer 1

#include <iostream>

int main()
{
//Enter number
std::cout << "Enter number n to find factorial:\n";
unsigned n = 0;
std::cin >> n ;

long long fact = 1;
//calculate factorial n!=1*2*3*...*n:
for( unsigned i =1; i <= n; ++i )
{
fact=fact*i;
}
std::cout << n << "!=" << fact <<"\n";
}