Write a Program in C++ to find the Factorial of a Number

/*ITERATIVE*/
//Calling the Header File.
#include<iostream>


//Declaring the main function   
int main()    
{
 
//Tells the compiler that we'll be using all the standard C++ library functions
    using namespace std;    
    int num,factorial=1;
 //Ask for the number.
    cout<<"Enter a number to calculate it's factorial"<<endl;  
    cin>>num;
    for(int i=1;i<=num;i++)
    {
        factorial=factorial*i;
    }
    cout<<"Factorial of "<<num<<"="<<factorial<<endl;
    cin.get();
 
    return 0;
}



/*RECURSION */ 
#include<iostream>

using namespace std;

int fact(int);
int main(){
  int num,f;
  cout<<"\nEnter a number: ";
  cin>>num;
  f=fact(num);
  cout<<"\nFactorial of "<<num<<" is: "<<f;
  return 0;
}
//recursive function
int fact(int n){
   if(n==1)
       return 1;
   else
       return(n*fact(n-1));
 }


/*
Summary: Factorial is represented using '!', so five factorial will be written as (5!),n factorial as (n!).Also
n! = n*(n-1)*(n-2)*(n-3)...3.2.1 and zero factorial is defined as one i.e. 0! = 1.
*/