C++ PROGRAM - FACTORIAL USING RECURSION.

Write a C++ program which calculates the factorial of a given number using recursion.

#include<conio.h>
#include<iostream.h>
long factorial (long a)
{
    if (a > 1)
        return (a * factorial (a-1));
    else
        return (1);
}
int main ()
{
    long ln;
    clrscr();
    cout << "Enter a number: ";
    cin >> ln;
    cout << ln << "!" << " = " << factorial (ln);
    getch();
    return 0;
}

OUTPUT

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