Lecture 144
//Procedures and Functions
//Code:
#include <iostream>
#include <conio.h>
using namespace std;
int fac(int); //
Prototype
main ()
{
int number = 0;
// Getting the input
from the user
cout << "
Please enter the number to calculate the factorial ";
cin>> number;
cout << "\n The factorial number is
: "<<fac(number);
getch();
return 0;
}
int fac(int n)
{
if(n==0) return 1;
if(n>0) return fac(n-1)*n;
}
Output:
