Factorial of a Number in C++ or CPP or C

Factorial means multiplication of 1 to n.

Program for Finding Factorial of a given number
#include<iostream.h>
#include<conio.h>

long int factorial(long int n)
{
     long int fact=1;
     while ( n > 0)
          fact = fact * n--;
     return fact;
}

int main( void )
{
      lont int num;
      cout << " Enter a Number :: ";
      cin >> num;
      long int res = factorial( num );
      cout << "Factorial of " << num << " is  "  << res;
      getch();
      return 0;
}


O/P

Enter a Number : 5
Factorial of 5 is 120.

<iframe width="560" height="315" src="https://www.youtube.com/embed/hBJrZr4qnoo" frameborder="0" allowfullscreen></iframe>
General Instructions:

1. Start Turbo - C++
2. Start New File , Press Alt + F, N
3. Type the above code
4. Save your program "factorial.cpp"
5. Compile your program by pressing Alt + F9
6. Run your program by pressing Ctrl + F9

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Thanks for Reading my Blog,

Anjeev Singh
Programming and Tricky Maths Guru
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