factor.cpp

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// factor.cpp
// calculates factorials, demonstrates FOR loop
#include <iostream>
using namespace std;

int main()
   {
   unsigned int numb;                
   unsigned long fact=1;             //long for larger numbers

   cout << "Enter a number: ";
   cin >> numb;                      //get number

   for(int j=numb; j>0; j--)         //multiply 1 by
      fact *= j;                     //numb, numb-1, ..., 2, 1
   cout << "Factorial is " << fact << endl;
   return 0;
   }