Question

C++

3. Write a program that recursively calculates n factorial (n!) a) Main should handle all input and output b) Create a function that accepts a number n and returns n factorial c) Demonstrate the function with sample input from console. n! n * n-1 * n-2 * n-3, for all n > 0 For example, 3!-3 21-6 using a recursive process to do so. Example output (input in bold italics) Enter a number: 5 5120

Answer 1

#include <iostream>

using namespace std;

int factorial(int n){
   if(n <= 1){
      return 1;
   }
   else{
      return n*factorial(n-1);
   }
}

int main () {
   int n;
   cout<<"Enter a number: ";
   cin>>n;
   cout<<endl;
   
   cout<<n<<"! = "<<factorial(n)<<endl;
   return 0;
}