C++ Program to Find Factorial

#include <iostream> using namespace std; int main() { int n; long double factorial = 1.0; cout << "Enter a positive integer: "; cin >> n; if (n < 0) cout << "Error! Factorial of a negative number doesn't exist."; else { for(int i = 1; i <= n; ++i) { factorial *= i; } cout << "Factorial of " << n << " = " << factorial; } return 0; }